Dev: make Datepicker pass JSHint with only eval setting overridden

1 files changed, 705 insertions, 506 deletions

diff --git a/ui/jquery.ui.datepicker.js b/ui/jquery.ui.datepicker.js
index e3c3bd398..584f21aaa 100644
--- a/ui/jquery.ui.datepicker.js
+++ b/ui/jquery.ui.datepicker.js
@@ -13,12 +13,12 @@
  */
 (function( $, undefined ) {
 
-/*jshint onevar: false, curly: false, eqeqeq: false, shadow: true, devel: true, evil: true */
+/*jshint evil: true */
 $.extend($.ui, { datepicker: { version: "@VERSION" } });
 
-var PROP_NAME = 'datepicker';
-var dpuuid = new Date().getTime();
-var instActive;
+var PROP_NAME = 'datepicker',
+	dpuuid = new Date().getTime(),
+	instActive;
 
 /* Date picker manager.
    Use the singleton instance of this class, $.datepicker, to interact with the date picker.
@@ -26,7 +26,6 @@ var instActive;
    allowing multiple different settings on the same page. */
 
 function Datepicker() {
-	this.debug = false; // Change this to true to start debugging
 	this._curInst = null; // The current instance in use
 	this._keyEvent = false; // If the last event was a key event
 	this._disabledInputs = []; // List of date picker inputs that have been disabled
@@ -121,12 +120,6 @@ $.extend(Datepicker.prototype, {
 	//Keep track of the maximum number of rows displayed (see #7043)
 	maxRows: 4,
 
-	/* Debug logging (if enabled). */
-	log: function () {
-		if (this.debug)
-			console.log.apply('', arguments);
-	},
-
 	// TODO rename to "widget" when switching to widget factory
 	_widgetDatepicker: function() {
 		return this.dpDiv;
@@ -147,9 +140,10 @@ $.extend(Datepicker.prototype, {
 	 */
 	_attachDatepicker: function(target, settings) {
 		// check for settings on the control itself - in namespace 'date:'
-		var inlineSettings = null;
-		for (var attrName in this._defaults) {
-			var attrValue = target.getAttribute('date:' + attrName);
+		var attrName, attrValue, nodeName, inline, inst,
+			inlineSettings = null;
+		for (attrName in this._defaults) {
+			attrValue = target.getAttribute('date:' + attrName);
 			if (attrValue) {
 				inlineSettings = inlineSettings || {};
 				try {
@@ -159,15 +153,15 @@ $.extend(Datepicker.prototype, {
 				}
 			}
 		}
-		var nodeName = target.nodeName.toLowerCase();
-		var inline = (nodeName == 'div' || nodeName == 'span');
+		nodeName = target.nodeName.toLowerCase();
+		inline = (nodeName === 'div' || nodeName === 'span');
 		if (!target.id) {
 			this.uuid += 1;
 			target.id = 'dp' + this.uuid;
 		}
-		var inst = this._newInst($(target), inline);
+		inst = this._newInst($(target), inline);
 		inst.settings = $.extend({}, settings || {}, inlineSettings || {});
-		if (nodeName == 'input') {
+		if (nodeName === 'input') {
 			this._connectDatepicker(target, inst);
 		} else if (inline) {
 			this._inlineDatepicker(target, inst);
@@ -190,8 +184,9 @@ $.extend(Datepicker.prototype, {
 		var input = $(target);
 		inst.append = $([]);
 		inst.trigger = $([]);
-		if (input.hasClass(this.markerClassName))
+		if (input.hasClass(this.markerClassName)) {
 			return;
+		}
 		this._attachments(input, inst);
 		input.addClass(this.markerClassName).keydown(this._doKeyDown).
 			keypress(this._doKeyPress).keyup(this._doKeyUp).
@@ -210,23 +205,31 @@ $.extend(Datepicker.prototype, {
 
 	/* Make attachments based on settings. */
 	_attachments: function(input, inst) {
-		var appendText = this._get(inst, 'appendText');
-		var isRTL = this._get(inst, 'isRTL');
-		if (inst.append)
+		var showOn, buttonText, buttonImage,
+			appendText = this._get(inst, 'appendText'),
+			isRTL = this._get(inst, 'isRTL');
+
+		if (inst.append) {
 			inst.append.remove();
+		}
 		if (appendText) {
 			inst.append = $('<span class="' + this._appendClass + '">' + appendText + '</span>');
 			input[isRTL ? 'before' : 'after'](inst.append);
 		}
+
 		input.unbind('focus', this._showDatepicker);
-		if (inst.trigger)
+
+		if (inst.trigger) {
 			inst.trigger.remove();
-		var showOn = this._get(inst, 'showOn');
-		if (showOn == 'focus' || showOn == 'both') // pop-up date picker when in the marked field
+		}
+
+		showOn = this._get(inst, 'showOn');
+		if (showOn === 'focus' || showOn === 'both') { // pop-up date picker when in the marked field
 			input.focus(this._showDatepicker);
-		if (showOn == 'button' || showOn == 'both') { // pop-up date picker when button clicked
-			var buttonText = this._get(inst, 'buttonText');
-			var buttonImage = this._get(inst, 'buttonImage');
+		}
+		if (showOn === 'button' || showOn === 'both') { // pop-up date picker when button clicked
+			buttonText = this._get(inst, 'buttonText');
+			buttonImage = this._get(inst, 'buttonImage');
 			inst.trigger = $(this._get(inst, 'buttonImageOnly') ?
 				$('<img/>').addClass(this._triggerClass).
 					attr({ src: buttonImage, alt: buttonText, title: buttonText }) :
@@ -235,13 +238,14 @@ $.extend(Datepicker.prototype, {
 					{ src:buttonImage, alt:buttonText, title:buttonText })));
 			input[isRTL ? 'before' : 'after'](inst.trigger);
 			inst.trigger.click(function() {
-				if ($.datepicker._datepickerShowing && $.datepicker._lastInput == input[0])
+				if ($.datepicker._datepickerShowing && $.datepicker._lastInput === input[0]) {
 					$.datepicker._hideDatepicker();
-				else if ($.datepicker._datepickerShowing && $.datepicker._lastInput != input[0]) {
+				} else if ($.datepicker._datepickerShowing && $.datepicker._lastInput !== input[0]) {
 					$.datepicker._hideDatepicker();
 					$.datepicker._showDatepicker(input[0]);
-				} else
+				} else {
 					$.datepicker._showDatepicker(input[0]);
+				}
 				return false;
 			});
 		}
@@ -250,13 +254,15 @@ $.extend(Datepicker.prototype, {
 	/* Apply the maximum length for the date format. */
 	_autoSize: function(inst) {
 		if (this._get(inst, 'autoSize') && !inst.inline) {
-			var date = new Date(2009, 12 - 1, 20); // Ensure double digits
-			var dateFormat = this._get(inst, 'dateFormat');
+			var findMax, max, maxI, i,
+				date = new Date(2009, 12 - 1, 20), // Ensure double digits
+				dateFormat = this._get(inst, 'dateFormat');
+
 			if (dateFormat.match(/[DM]/)) {
-				var findMax = function(names) {
-					var max = 0;
-					var maxI = 0;
-					for (var i = 0; i < names.length; i++) {
+				findMax = function(names) {
+					max = 0;
+					maxI = 0;
+					for (i = 0; i < names.length; i++) {
 						if (names[i].length > max) {
 							max = names[i].length;
 							maxI = i;
@@ -276,8 +282,9 @@ $.extend(Datepicker.prototype, {
 	/* Attach an inline date picker to a div. */
 	_inlineDatepicker: function(target, inst) {
 		var divSpan = $(target);
-		if (divSpan.hasClass(this.markerClassName))
+		if (divSpan.hasClass(this.markerClassName)) {
 			return;
+		}
 		divSpan.addClass(this.markerClassName).append(inst.dpDiv).
 			bind("setData.datepicker", function(event, key, value){
 				inst.settings[key] = value;
@@ -308,10 +315,12 @@ $.extend(Datepicker.prototype, {
 	 * @return the manager object
 	 */
 	_dialogDatepicker: function(input, date, onSelect, settings, pos) {
-		var inst = this._dialogInst; // internal instance
+		var id, browserWidth, browserHeight, scrollX, scrollY,
+			inst = this._dialogInst; // internal instance
+
 		if (!inst) {
 			this.uuid += 1;
-			var id = 'dp' + this.uuid;
+			id = 'dp' + this.uuid;
 			this._dialogInput = $('<input type="text" id="' + id +
 				'" style="position: absolute; top: -100px; width: 0px;"/>');
 			this._dialogInput.keydown(this._doKeyDown);
@@ -321,15 +330,15 @@ $.extend(Datepicker.prototype, {
 			$.data(this._dialogInput[0], PROP_NAME, inst);
 		}
 		extendRemove(inst.settings, settings || {});
-		date = (date && date.constructor == Date ? this._formatDate(inst, date) : date);
+		date = (date && date.constructor === Date ? this._formatDate(inst, date) : date);
 		this._dialogInput.val(date);
 
 		this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);
 		if (!this._pos) {
-			var browserWidth = document.documentElement.clientWidth;
-			var browserHeight = document.documentElement.clientHeight;
-			var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
-			var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
+			browserWidth = document.documentElement.clientWidth;
+			browserHeight = document.documentElement.clientHeight;
+			scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
+			scrollY = document.documentElement.scrollTop || document.body.scrollTop;
 			this._pos = // should use actual width/height below
 				[(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];
 		}
@@ -340,8 +349,9 @@ $.extend(Datepicker.prototype, {
 		this._inDialog = true;
 		this.dpDiv.addClass(this._dialogClass);
 		this._showDatepicker(this._dialogInput[0]);
-		if ($.blockUI)
+		if ($.blockUI) {
 			$.blockUI(this.dpDiv);
+		}
 		$.data(this._dialogInput[0], PROP_NAME, inst);
 		return this;
 	},
@@ -350,14 +360,17 @@ $.extend(Datepicker.prototype, {
 	 * @param  target	element - the target input field or division or span
 	 */
 	_destroyDatepicker: function(target) {
-		var $target = $(target);
-		var inst = $.data(target, PROP_NAME);
+		var nodeName,
+			$target = $(target),
+			inst = $.data(target, PROP_NAME);
+
 		if (!$target.hasClass(this.markerClassName)) {
 			return;
 		}
-		var nodeName = target.nodeName.toLowerCase();
+
+		nodeName = target.nodeName.toLowerCase();
 		$.removeData(target, PROP_NAME);
-		if (nodeName == 'input') {
+		if (nodeName === 'input') {
 			inst.append.remove();
 			inst.trigger.remove();
 			$target.removeClass(this.markerClassName).
@@ -365,60 +378,65 @@ $.extend(Datepicker.prototype, {
 				unbind('keydown', this._doKeyDown).
 				unbind('keypress', this._doKeyPress).
 				unbind('keyup', this._doKeyUp);
-		} else if (nodeName == 'div' || nodeName == 'span')
+		} else if (nodeName === 'div' || nodeName === 'span') {
 			$target.removeClass(this.markerClassName).empty();
+		}
 	},
 
 	/* Enable the date picker to a jQuery selection.
 	 * @param  target	element - the target input field or division or span
 	 */
 	_enableDatepicker: function(target) {
-		var $target = $(target);
-		var inst = $.data(target, PROP_NAME);
+		var nodeName, inline,
+			$target = $(target),
+			inst = $.data(target, PROP_NAME);
+
 		if (!$target.hasClass(this.markerClassName)) {
 			return;
 		}
-		var nodeName = target.nodeName.toLowerCase();
-		if (nodeName == 'input') {
+
+		nodeName = target.nodeName.toLowerCase();
+		if (nodeName === 'input') {
 			target.disabled = false;
 			inst.trigger.filter('button').
 				each(function() { this.disabled = false; }).end().
 				filter('img').css({opacity: '1.0', cursor: ''});
-		}
-		else if (nodeName == 'div' || nodeName == 'span') {
-			var inline = $target.children('.' + this._inlineClass);
+		} else if (nodeName === 'div' || nodeName === 'span') {
+			inline = $target.children('.' + this._inlineClass);
 			inline.children().removeClass('ui-state-disabled');
 			inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
 				prop("disabled", false);
 		}
 		this._disabledInputs = $.map(this._disabledInputs,
-			function(value) { return (value == target ? null : value); }); // delete entry
+			function(value) { return (value === target ? null : value); }); // delete entry
 	},
 
 	/* Disable the date picker to a jQuery selection.
 	 * @param  target	element - the target input field or division or span
 	 */
 	_disableDatepicker: function(target) {
-		var $target = $(target);
-		var inst = $.data(target, PROP_NAME);
+		var nodeName, inline,
+			$target = $(target),
+			inst = $.data(target, PROP_NAME);
+
 		if (!$target.hasClass(this.markerClassName)) {
 			return;
 		}
-		var nodeName = target.nodeName.toLowerCase();
-		if (nodeName == 'input') {
+
+		nodeName = target.nodeName.toLowerCase();
+		if (nodeName === 'input') {
 			target.disabled = true;
 			inst.trigger.filter('button').
 				each(function() { this.disabled = true; }).end().
 				filter('img').css({opacity: '0.5', cursor: 'default'});
-		}
-		else if (nodeName == 'div' || nodeName == 'span') {
-			var inline = $target.children('.' + this._inlineClass);
+		} else if (nodeName === 'div' || nodeName === 'span') {
+			inline = $target.children('.' + this._inlineClass);
 			inline.children().addClass('ui-state-disabled');
 			inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
 				prop("disabled", true);
 		}
 		this._disabledInputs = $.map(this._disabledInputs,
-			function(value) { return (value == target ? null : value); }); // delete entry
+			function(value) { return (value === target ? null : value); }); // delete entry
 		this._disabledInputs[this._disabledInputs.length] = target;
 	},
 
@@ -431,8 +449,9 @@ $.extend(Datepicker.prototype, {
 			return false;
 		}
 		for (var i = 0; i < this._disabledInputs.length; i++) {
-			if (this._disabledInputs[i] == target)
+			if (this._disabledInputs[i] === target) {
 				return true;
+			}
 		}
 		return false;
 	},
@@ -461,30 +480,37 @@ $.extend(Datepicker.prototype, {
 	 *				(omit if above is an object or to retrieve a value)
 	 */
 	_optionDatepicker: function(target, name, value) {
-		var inst = this._getInst(target);
-		if (arguments.length == 2 && typeof name == 'string') {
-			return (name == 'defaults' ? $.extend({}, $.datepicker._defaults) :
-				(inst ? (name == 'all' ? $.extend({}, inst.settings) :
+		var settings, date, minDate, maxDate,
+			inst = this._getInst(target);
+
+		if (arguments.length === 2 && typeof name === 'string') {
+			return (name === 'defaults' ? $.extend({}, $.datepicker._defaults) :
+				(inst ? (name === 'all' ? $.extend({}, inst.settings) :
 				this._get(inst, name)) : null));
 		}
-		var settings = name || {};
-		if (typeof name == 'string') {
+
+		settings = name || {};
+		if (typeof name === 'string') {
 			settings = {};
 			settings[name] = value;
 		}
+
 		if (inst) {
-			if (this._curInst == inst) {
+			if (this._curInst === inst) {
 				this._hideDatepicker();
 			}
-			var date = this._getDateDatepicker(target, true);
-			var minDate = this._getMinMaxDate(inst, 'min');
-			var maxDate = this._getMinMaxDate(inst, 'max');
+
+			date = this._getDateDatepicker(target, true);
+			minDate = this._getMinMaxDate(inst, 'min');
+			maxDate = this._getMinMaxDate(inst, 'max');
 			extendRemove(inst.settings, settings);
 			// reformat the old minDate/maxDate values if dateFormat changes and a new minDate/maxDate isn't provided
-			if (minDate !== null && settings.dateFormat !== undefined && settings.minDate === undefined)
+			if (minDate !== null && settings.dateFormat !== undefined && settings.minDate === undefined) {
 				inst.settings.minDate = this._formatDate(inst, minDate);
-			if (maxDate !== null && settings.dateFormat !== undefined && settings.maxDate === undefined)
+			}
+			if (maxDate !== null && settings.dateFormat !== undefined && settings.maxDate === undefined) {
 				inst.settings.maxDate = this._formatDate(inst, maxDate);
+			}
 			this._attachments($(target), inst);
 			this._autoSize(inst);
 			this._setDate(inst, date);
@@ -528,35 +554,41 @@ $.extend(Datepicker.prototype, {
 	 */
 	_getDateDatepicker: function(target, noDefault) {
 		var inst = this._getInst(target);
-		if (inst && !inst.inline)
+		if (inst && !inst.inline) {
 			this._setDateFromField(inst, noDefault);
+		}
 		return (inst ? this._getDate(inst) : null);
 	},
 
 	/* Handle keystrokes. */
 	_doKeyDown: function(event) {
-		var inst = $.datepicker._getInst(event.target);
-		var handled = true;
-		var isRTL = inst.dpDiv.is('.ui-datepicker-rtl');
+		var onSelect, dateStr, sel,
+			inst = $.datepicker._getInst(event.target),
+			handled = true,
+			isRTL = inst.dpDiv.is('.ui-datepicker-rtl');
+
 		inst._keyEvent = true;
-		if ($.datepicker._datepickerShowing)
+		if ($.datepicker._datepickerShowing) {
 			switch (event.keyCode) {
 				case 9: $.datepicker._hideDatepicker();
 						handled = false;
 						break; // hide on tab out
-				case 13: var sel = $('td.' + $.datepicker._dayOverClass + ':not(.' +
+				case 13: sel = $('td.' + $.datepicker._dayOverClass + ':not(.' +
 									$.datepicker._currentClass + ')', inst.dpDiv);
-						if (sel[0])
+						if (sel[0]) {
 							$.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);
-							var onSelect = $.datepicker._get(inst, 'onSelect');
-							if (onSelect) {
-								var dateStr = $.datepicker._formatDate(inst);
+						}
 
-								// trigger custom callback
-								onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);
-							}
-						else
+						onSelect = $.datepicker._get(inst, 'onSelect');
+						if (onSelect) {
+							dateStr = $.datepicker._formatDate(inst);
+
+							// trigger custom callback
+							onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);
+						} else {
 							$.datepicker._hideDatepicker();
+						}
+
 						return false; // don't submit the form
 				case 27: $.datepicker._hideDatepicker();
 						break; // hide on escape
@@ -568,41 +600,58 @@ $.extend(Datepicker.prototype, {
 							+$.datepicker._get(inst, 'stepBigMonths') :
 							+$.datepicker._get(inst, 'stepMonths')), 'M');
 						break; // next month/year on page down/+ ctrl
-				case 35: if (event.ctrlKey || event.metaKey) $.datepicker._clearDate(event.target);
+				case 35: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._clearDate(event.target);
+						}
 						handled = event.ctrlKey || event.metaKey;
 						break; // clear on ctrl or command +end
-				case 36: if (event.ctrlKey || event.metaKey) $.datepicker._gotoToday(event.target);
+				case 36: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._gotoToday(event.target);
+						}
 						handled = event.ctrlKey || event.metaKey;
 						break; // current on ctrl or command +home
-				case 37: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? +1 : -1), 'D');
+				case 37: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._adjustDate(event.target, (isRTL ? +1 : -1), 'D');
+						}
 						handled = event.ctrlKey || event.metaKey;
 						// -1 day on ctrl or command +left
-						if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
-									-$.datepicker._get(inst, 'stepBigMonths') :
-									-$.datepicker._get(inst, 'stepMonths')), 'M');
+						if (event.originalEvent.altKey) {
+							$.datepicker._adjustDate(event.target, (event.ctrlKey ?
+								-$.datepicker._get(inst, 'stepBigMonths') :
+								-$.datepicker._get(inst, 'stepMonths')), 'M');
+						}
 						// next month/year on alt +left on Mac
 						break;
-				case 38: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, -7, 'D');
+				case 38: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._adjustDate(event.target, -7, 'D');
+						}
 						handled = event.ctrlKey || event.metaKey;
 						break; // -1 week on ctrl or command +up
-				case 39: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? -1 : +1), 'D');
+				case 39: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._adjustDate(event.target, (isRTL ? -1 : +1), 'D');
+						}
 						handled = event.ctrlKey || event.metaKey;
 						// +1 day on ctrl or command +right
-						if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
-									+$.datepicker._get(inst, 'stepBigMonths') :
-									+$.datepicker._get(inst, 'stepMonths')), 'M');
+						if (event.originalEvent.altKey) {
+							$.datepicker._adjustDate(event.target, (event.ctrlKey ?
+								+$.datepicker._get(inst, 'stepBigMonths') :
+								+$.datepicker._get(inst, 'stepMonths')), 'M');
+						}
 						// next month/year on alt +right
 						break;
-				case 40: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, +7, 'D');
+				case 40: if (event.ctrlKey || event.metaKey) {
+							$.datepicker._adjustDate(event.target, +7, 'D');
+						}
 						handled = event.ctrlKey || event.metaKey;
 						break; // +1 week on ctrl or command +down
 				default: handled = false;
 			}
-		else if (event.keyCode == 36 && event.ctrlKey) // display the date picker on ctrl+home
+		} else if (event.keyCode === 36 && event.ctrlKey) { // display the date picker on ctrl+home
 			$.datepicker._showDatepicker(this);
-		else {
+		} else {
 			handled = false;
 		}
+
 		if (handled) {
 			event.preventDefault();
 			event.stopPropagation();
@@ -611,22 +660,27 @@ $.extend(Datepicker.prototype, {
 
 	/* Filter entered characters - based on date format. */
 	_doKeyPress: function(event) {
-		var inst = $.datepicker._getInst(event.target);
+		var chars, chr,
+			inst = $.datepicker._getInst(event.target);
+
 		if ($.datepicker._get(inst, 'constrainInput')) {
-			var chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
-			var chr = String.fromCharCode(event.charCode == null ? event.keyCode : event.charCode);
+			chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
+			chr = String.fromCharCode(event.charCode == null ? event.keyCode : event.charCode);
 			return event.ctrlKey || event.metaKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);
 		}
 	},
 
 	/* Synchronise manual entry and field/alternate field. */
 	_doKeyUp: function(event) {
-		var inst = $.datepicker._getInst(event.target);
-		if (inst.input.val() != inst.lastVal) {
+		var date,
+			inst = $.datepicker._getInst(event.target);
+
+		if (inst.input.val() !== inst.lastVal) {
 			try {
-				var date = $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
+				date = $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
 					(inst.input ? inst.input.val() : null),
 					$.datepicker._getFormatConfig(inst));
+
 				if (date) { // only if valid
 					$.datepicker._setDateFromField(inst);
 					$.datepicker._updateAlternate(inst);
@@ -634,7 +688,6 @@ $.extend(Datepicker.prototype, {
 				}
 			}
 			catch (err) {
-				$.datepicker.log(err);
 			}
 		}
 		return true;
@@ -647,39 +700,51 @@ $.extend(Datepicker.prototype, {
 	 */
 	_showDatepicker: function(input) {
 		input = input.target || input;
-		if (input.nodeName.toLowerCase() != 'input') // find from button/image trigger
+		if (input.nodeName.toLowerCase() !== 'input') { // find from button/image trigger
 			input = $('input', input.parentNode)[0];
-		if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput == input) // already here
+		}
+
+		if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput === input) { // already here
 			return;
-		var inst = $.datepicker._getInst(input);
-		if ($.datepicker._curInst && $.datepicker._curInst != inst) {
+		}
+
+		var inst, beforeShow, beforeShowSettings, isFixed,
+			offset, showAnim, duration;
+
+		inst = $.datepicker._getInst(input);
+		if ($.datepicker._curInst && $.datepicker._curInst !== inst) {
 			$.datepicker._curInst.dpDiv.stop(true, true);
 			if ( inst && $.datepicker._datepickerShowing ) {
 				$.datepicker._hideDatepicker( $.datepicker._curInst.input[0] );
 			}
 		}
-		var beforeShow = $.datepicker._get(inst, 'beforeShow');
-		var beforeShowSettings = beforeShow ? beforeShow.apply(input, [input, inst]) : {};
+
+		beforeShow = $.datepicker._get(inst, 'beforeShow');
+		beforeShowSettings = beforeShow ? beforeShow.apply(input, [input, inst]) : {};
 		if(beforeShowSettings === false){
-			//false
 			return;
 		}
 		extendRemove(inst.settings, beforeShowSettings);
+
 		inst.lastVal = null;
 		$.datepicker._lastInput = input;
 		$.datepicker._setDateFromField(inst);
-		if ($.datepicker._inDialog) // hide cursor
+
+		if ($.datepicker._inDialog) { // hide cursor
 			input.value = '';
+		}
 		if (!$.datepicker._pos) { // position below input
 			$.datepicker._pos = $.datepicker._findPos(input);
 			$.datepicker._pos[1] += input.offsetHeight; // add the height
 		}
-		var isFixed = false;
+
+		isFixed = false;
 		$(input).parents().each(function() {
-			isFixed |= $(this).css('position') == 'fixed';
+			isFixed |= $(this).css('position') === 'fixed';
 			return !isFixed;
 		});
-		var offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
+
+		offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
 		$.datepicker._pos = null;
 		//to avoid flashes on Firefox
 		inst.dpDiv.empty();
@@ -692,18 +757,22 @@ $.extend(Datepicker.prototype, {
 		inst.dpDiv.css({position: ($.datepicker._inDialog && $.blockUI ?
 			'static' : (isFixed ? 'fixed' : 'absolute')), display: 'none',
 			left: offset.left + 'px', top: offset.top + 'px'});
+
 		if (!inst.inline) {
-			var showAnim = $.datepicker._get(inst, 'showAnim');
-			var duration = $.datepicker._get(inst, 'duration');
+			showAnim = $.datepicker._get(inst, 'showAnim');
+			duration = $.datepicker._get(inst, 'duration');
 			inst.dpDiv.zIndex($(input).zIndex()+1);
 			$.datepicker._datepickerShowing = true;
 
-			if ( $.effects && $.effects.effect[ showAnim ] )
+			if ( $.effects && $.effects.effect[ showAnim ] ) {
 				inst.dpDiv.show(showAnim, $.datepicker._get(inst, 'showOptions'), duration);
-			else
+			} else {
 				inst.dpDiv[showAnim || 'show'](showAnim ? duration : null);
-			if (inst.input.is(':visible') && !inst.input.is(':disabled'))
+			}
+
+			if (inst.input.is(':visible') && !inst.input.is(':disabled')) {
 				inst.input.focus();
+			}
 			$.datepicker._curInst = inst;
 		}
 	},
@@ -715,24 +784,31 @@ $.extend(Datepicker.prototype, {
 		inst.dpDiv.empty().append(this._generateHTML(inst));
 		this._attachHandlers(inst);
 		inst.dpDiv.find('.' + this._dayOverClass + ' a').mouseover();
-		var numMonths = this._getNumberOfMonths(inst);
-		var cols = numMonths[1];
-		var width = 17;
+
+		var origyearshtml,
+			numMonths = this._getNumberOfMonths(inst),
+			cols = numMonths[1],
+			width = 17;
+
 		inst.dpDiv.removeClass('ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4').width('');
-		if (cols > 1)
+		if (cols > 1) {
 			inst.dpDiv.addClass('ui-datepicker-multi-' + cols).css('width', (width * cols) + 'em');
-		inst.dpDiv[(numMonths[0] != 1 || numMonths[1] != 1 ? 'add' : 'remove') +
+		}
+		inst.dpDiv[(numMonths[0] !== 1 || numMonths[1] !== 1 ? 'add' : 'remove') +
 			'Class']('ui-datepicker-multi');
 		inst.dpDiv[(this._get(inst, 'isRTL') ? 'add' : 'remove') +
 			'Class']('ui-datepicker-rtl');
-		if (inst == $.datepicker._curInst && $.datepicker._datepickerShowing && inst.input &&
-				// #6694 - don't focus the input if it's already focused
-				// this breaks the change event in IE
-				inst.input.is(':visible') && !inst.input.is(':disabled') && inst.input[0] != document.activeElement)
+
+		// #6694 - don't focus the input if it's already focused
+		// this breaks the change event in IE
+		if (inst === $.datepicker._curInst && $.datepicker._datepickerShowing && inst.input &&
+			inst.input.is(':visible') && !inst.input.is(':disabled') && inst.input[0] !== document.activeElement) {
 			inst.input.focus();
+		}
+
 		// deffered render of the years select (to avoid flashes on Firefox)
 		if( inst.yearshtml ){
-			var origyearshtml = inst.yearshtml;
+			origyearshtml = inst.yearshtml;
 			setTimeout(function(){
 				//assure that inst.yearshtml didn't change.
 				if( origyearshtml === inst.yearshtml && inst.yearshtml ){
@@ -757,16 +833,16 @@ $.extend(Datepicker.prototype, {
 
 	/* Check positioning to remain on screen. */
 	_checkOffset: function(inst, offset, isFixed) {
-		var dpWidth = inst.dpDiv.outerWidth();
-		var dpHeight = inst.dpDiv.outerHeight();
-		var inputWidth = inst.input ? inst.input.outerWidth() : 0;
-		var inputHeight = inst.input ? inst.input.outerHeight() : 0;
-		var viewWidth = document.documentElement.clientWidth + (isFixed ? 0 : $(document).scrollLeft());
-		var viewHeight = document.documentElement.clientHeight + (isFixed ? 0 : $(document).scrollTop());
+		var dpWidth = inst.dpDiv.outerWidth(),
+			dpHeight = inst.dpDiv.outerHeight(),
+			inputWidth = inst.input ? inst.input.outerWidth() : 0,
+			inputHeight = inst.input ? inst.input.outerHeight() : 0,
+			viewWidth = document.documentElement.clientWidth + (isFixed ? 0 : $(document).scrollLeft()),
+			viewHeight = document.documentElement.clientHeight + (isFixed ? 0 : $(document).scrollTop());
 
 		offset.left -= (this._get(inst, 'isRTL') ? (dpWidth - inputWidth) : 0);
-		offset.left -= (isFixed && offset.left == inst.input.offset().left) ? $(document).scrollLeft() : 0;
-		offset.top -= (isFixed && offset.top == (inst.input.offset().top + inputHeight)) ? $(document).scrollTop() : 0;
+		offset.left -= (isFixed && offset.left === inst.input.offset().left) ? $(document).scrollLeft() : 0;
+		offset.top -= (isFixed && offset.top === (inst.input.offset().top + inputHeight)) ? $(document).scrollTop() : 0;
 
 		// now check if datepicker is showing outside window viewport - move to a better place if so.
 		offset.left -= Math.min(offset.left, (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ?
@@ -779,12 +855,15 @@ $.extend(Datepicker.prototype, {
 
 	/* Find an object's position on the screen. */
 	_findPos: function(obj) {
-		var inst = this._getInst(obj);
-		var isRTL = this._get(inst, 'isRTL');
-		while (obj && (obj.type == 'hidden' || obj.nodeType != 1 || $.expr.filters.hidden(obj))) {
+		var position,
+			inst = this._getInst(obj),
+			isRTL = this._get(inst, 'isRTL');
+
+		while (obj && (obj.type === 'hidden' || obj.nodeType !== 1 || $.expr.filters.hidden(obj))) {
 			obj = obj[isRTL ? 'previousSibling' : 'nextSibling'];
 		}
-		var position = $(obj).offset();
+
+		position = $(obj).offset();
 		return [position.left, position.top];
 	},
 
@@ -792,29 +871,38 @@ $.extend(Datepicker.prototype, {
 	 * @param  input  element - the input field attached to the date picker
 	 */
 	_hideDatepicker: function(input) {
-		var inst = this._curInst;
-		if (!inst || (input && inst != $.data(input, PROP_NAME)))
+		var showAnim, duration, postProcess, onClose,
+			inst = this._curInst;
+
+		if (!inst || (input && inst !== $.data(input, PROP_NAME))) {
 			return;
+		}
+
 		if (this._datepickerShowing) {
-			var showAnim = this._get(inst, 'showAnim');
-			var duration = this._get(inst, 'duration');
-			var postProcess = function() {
+			showAnim = this._get(inst, 'showAnim');
+			duration = this._get(inst, 'duration');
+			postProcess = function() {
 				$.datepicker._tidyDialog(inst);
 			};
 
 			// DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
-			if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) )
+			if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) ) {
 				inst.dpDiv.hide(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);
-			else
-				inst.dpDiv[(showAnim == 'slideDown' ? 'slideUp' :
-					(showAnim == 'fadeIn' ? 'fadeOut' : 'hide'))]((showAnim ? duration : null), postProcess);
-			if (!showAnim)
+			} else {
+				inst.dpDiv[(showAnim === 'slideDown' ? 'slideUp' :
+					(showAnim === 'fadeIn' ? 'fadeOut' : 'hide'))]((showAnim ? duration : null), postProcess);
+			}
+
+			if (!showAnim) {
 				postProcess();
+			}
 			this._datepickerShowing = false;
-			var onClose = this._get(inst, 'onClose');
-			if (onClose)
-				onClose.apply((inst.input ? inst.input[0] : null),
-					[(inst.input ? inst.input.val() : ''), inst]);
+
+			onClose = this._get(inst, 'onClose');
+			if (onClose) {
+				onClose.apply((inst.input ? inst.input[0] : null), [(inst.input ? inst.input.val() : ''), inst]);
+			}
+
 			this._lastInput = null;
 			if (this._inDialog) {
 				this._dialogInput.css({ position: 'absolute', left: '0', top: '-100px' });
@@ -834,45 +922,49 @@ $.extend(Datepicker.prototype, {
 
 	/* Close date picker if clicked elsewhere. */
 	_checkExternalClick: function(event) {
-		if (!$.datepicker._curInst)
+		if (!$.datepicker._curInst) {
 			return;
+		}
 
 		var $target = $(event.target),
 			inst = $.datepicker._getInst($target[0]);
 
-		if ( ( ( $target[0].id != $.datepicker._mainDivId &&
+		if ( ( ( $target[0].id !== $.datepicker._mainDivId &&
 				$target.parents('#' + $.datepicker._mainDivId).length === 0 &&
 				!$target.hasClass($.datepicker.markerClassName) &&
 				!$target.closest("." + $.datepicker._triggerClass).length &&
 				$.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI) ) ) ||
-			( $target.hasClass($.datepicker.markerClassName) && $.datepicker._curInst != inst ) )
-			$.datepicker._hideDatepicker();
+			( $target.hasClass($.datepicker.markerClassName) && $.datepicker._curInst !== inst ) ) {
+				$.datepicker._hideDatepicker();
+		}
 	},
 
 	/* Adjust one of the date sub-fields. */
 	_adjustDate: function(id, offset, period) {
-		var target = $(id);
-		var inst = this._getInst(target[0]);
+		var target = $(id),
+			inst = this._getInst(target[0]);
+
 		if (this._isDisabledDatepicker(target[0])) {
 			return;
 		}
 		this._adjustInstDate(inst, offset +
-			(period == 'M' ? this._get(inst, 'showCurrentAtPos') : 0), // undo positioning
+			(period === 'M' ? this._get(inst, 'showCurrentAtPos') : 0), // undo positioning
 			period);
 		this._updateDatepicker(inst);
 	},
 
 	/* Action for current link. */
 	_gotoToday: function(id) {
-		var target = $(id);
-		var inst = this._getInst(target[0]);
+		var date,
+			target = $(id),
+			inst = this._getInst(target[0]);
+
 		if (this._get(inst, 'gotoCurrent') && inst.currentDay) {
 			inst.selectedDay = inst.currentDay;
 			inst.drawMonth = inst.selectedMonth = inst.currentMonth;
 			inst.drawYear = inst.selectedYear = inst.currentYear;
-		}
-		else {
-			var date = new Date();
+		} else {
+			date = new Date();
 			inst.selectedDay = date.getDate();
 			inst.drawMonth = inst.selectedMonth = date.getMonth();
 			inst.drawYear = inst.selectedYear = date.getFullYear();
@@ -883,22 +975,27 @@ $.extend(Datepicker.prototype, {
 
 	/* Action for selecting a new month/year. */
 	_selectMonthYear: function(id, select, period) {
-		var target = $(id);
-		var inst = this._getInst(target[0]);
-		inst['selected' + (period == 'M' ? 'Month' : 'Year')] =
-		inst['draw' + (period == 'M' ? 'Month' : 'Year')] =
+		var target = $(id),
+			inst = this._getInst(target[0]);
+
+		inst['selected' + (period === 'M' ? 'Month' : 'Year')] =
+		inst['draw' + (period === 'M' ? 'Month' : 'Year')] =
 			parseInt(select.options[select.selectedIndex].value,10);
+
 		this._notifyChange(inst);
 		this._adjustDate(target);
 	},
 
 	/* Action for selecting a day. */
 	_selectDay: function(id, month, year, td) {
-		var target = $(id);
+		var inst,
+			target = $(id);
+
 		if ($(td).hasClass(this._unselectableClass) || this._isDisabledDatepicker(target[0])) {
 			return;
 		}
-		var inst = this._getInst(target[0]);
+
+		inst = this._getInst(target[0]);
 		inst.selectedDay = inst.currentDay = $('a', td).html();
 		inst.selectedMonth = inst.currentMonth = month;
 		inst.selectedYear = inst.currentYear = year;
@@ -914,35 +1011,44 @@ $.extend(Datepicker.prototype, {
 
 	/* Update the input field with the selected date. */
 	_selectDate: function(id, dateStr) {
-		var target = $(id);
-		var inst = this._getInst(target[0]);
+		var onSelect,
+			target = $(id),
+			inst = this._getInst(target[0]);
+
 		dateStr = (dateStr != null ? dateStr : this._formatDate(inst));
-		if (inst.input)
+		if (inst.input) {
 			inst.input.val(dateStr);
+		}
 		this._updateAlternate(inst);
-		var onSelect = this._get(inst, 'onSelect');
-		if (onSelect)
+
+		onSelect = this._get(inst, 'onSelect');
+		if (onSelect) {
 			onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
-		else if (inst.input)
+		} else if (inst.input) {
 			inst.input.trigger('change'); // fire the change event
-		if (inst.inline)
+		}
+
+		if (inst.inline){
 			this._updateDatepicker(inst);
-		else {
+		} else {
 			this._hideDatepicker();
 			this._lastInput = inst.input[0];
-			if (typeof(inst.input[0]) != 'object')
+			if (typeof(inst.input[0]) !== 'object') {
 				inst.input.focus(); // restore focus
+			}
 			this._lastInput = null;
 		}
 	},
 
 	/* Update any alternate field to synchronise with the main field. */
 	_updateAlternate: function(inst) {
-		var altField = this._get(inst, 'altField');
+		var altFormat, date, dateStr,
+			altField = this._get(inst, 'altField');
+
 		if (altField) { // update alternate field too
-			var altFormat = this._get(inst, 'altFormat') || this._get(inst, 'dateFormat');
-			var date = this._getDate(inst);
-			var dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));
+			altFormat = this._get(inst, 'altFormat') || this._get(inst, 'dateFormat');
+			date = this._getDate(inst);
+			dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));
 			$(altField).each(function() { $(this).val(dateStr); });
 		}
 	},
@@ -961,10 +1067,13 @@ $.extend(Datepicker.prototype, {
 	 * @return  number - the number of the week within the year that contains this date
 	 */
 	iso8601Week: function(date) {
-		var checkDate = new Date(date.getTime());
+		var time,
+			checkDate = new Date(date.getTime());
+
 		// Find Thursday of this week starting on Monday
 		checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
-		var time = checkDate.getTime();
+
+		time = checkDate.getTime();
 		checkDate.setMonth(0); // Compare with Jan 1
 		checkDate.setDate(1);
 		return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
@@ -984,77 +1093,90 @@ $.extend(Datepicker.prototype, {
 	 * @return  Date - the extracted date value or null if value is blank
 	 */
 	parseDate: function (format, value, settings) {
-		if (format == null || value == null)
+		if (format == null || value == null) {
 			throw 'Invalid arguments';
-		value = (typeof value == 'object' ? value.toString() : value + '');
-		if (value === '')
+		}
+
+		value = (typeof value === 'object' ? value.toString() : value + '');
+		if (value === '') {
 			return null;
-		var shortYearCutoff = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff;
-		shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
-				new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
-		var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
-		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
-		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
-		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
-		var year = -1;
-		var month = -1;
-		var day = -1;
-		var doy = -1;
-		var literal = false;
-		// Check whether a format character is doubled
-		var lookAhead = function(match) {
-			var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
-			if (matches)
-				iFormat++;
-			return matches;
-		};
-		// Extract a number from the string value
-		var getNumber = function(match) {
-			var isDoubled = lookAhead(match);
-			var size = (match == '@' ? 14 : (match == '!' ? 20 :
-				(match == 'y' && isDoubled ? 4 : (match == 'o' ? 3 : 2))));
-			var digits = new RegExp('^\\d{1,' + size + '}');
-			var num = value.substring(iValue).match(digits);
-			if (!num)
-				throw 'Missing number at position ' + iValue;
-			iValue += num[0].length;
-			return parseInt(num[0], 10);
-		};
-		// Extract a name from the string value and convert to an index
-		var getName = function(match, shortNames, longNames) {
-			var names = $.map(lookAhead(match) ? longNames : shortNames, function (v, k) {
-				return [ [k, v] ];
-			}).sort(function (a, b) {
-				return -(a[1].length - b[1].length);
-			});
-			var index = -1;
-			$.each(names, function (i, pair) {
-				var name = pair[1];
-				if (value.substr(iValue, name.length).toLowerCase() == name.toLowerCase()) {
-					index = pair[0];
-					iValue += name.length;
-					return false;
+		}
+
+		var iFormat, dim, extra,
+			iValue = 0,
+			shortYearCutoffTemp = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff,
+			shortYearCutoff = (typeof shortYearCutoffTemp !== 'string' ? shortYearCutoffTemp :
+				new Date().getFullYear() % 100 + parseInt(shortYearCutoffTemp, 10)),
+			dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort,
+			dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames,
+			monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort,
+			monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames,
+			year = -1,
+			month = -1,
+			day = -1,
+			doy = -1,
+			literal = false,
+			date,
+			// Check whether a format character is doubled
+			lookAhead = function(match) {
+				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
+				if (matches) {
+					iFormat++;
 				}
-			});
-			if (index != -1)
-				return index + 1;
-			else
-				throw 'Unknown name at position ' + iValue;
-		};
-		// Confirm that a literal character matches the string value
-		var checkLiteral = function() {
-			if (value.charAt(iValue) != format.charAt(iFormat))
-				throw 'Unexpected literal at position ' + iValue;
-			iValue++;
-		};
-		var iValue = 0;
-		for (var iFormat = 0; iFormat < format.length; iFormat++) {
-			if (literal)
-				if (format.charAt(iFormat) == "'" && !lookAhead("'"))
+				return matches;
+			},
+			// Extract a number from the string value
+			getNumber = function(match) {
+				var isDoubled = lookAhead(match),
+					size = (match === '@' ? 14 : (match === '!' ? 20 :
+					(match === 'y' && isDoubled ? 4 : (match === 'o' ? 3 : 2)))),
+					digits = new RegExp('^\\d{1,' + size + '}'),
+					num = value.substring(iValue).match(digits);
+				if (!num) {
+					throw 'Missing number at position ' + iValue;
+				}
+				iValue += num[0].length;
+				return parseInt(num[0], 10);
+			},
+			// Extract a name from the string value and convert to an index
+			getName = function(match, shortNames, longNames) {
+				var index = -1,
+					names = $.map(lookAhead(match) ? longNames : shortNames, function (v, k) {
+						return [ [k, v] ];
+					}).sort(function (a, b) {
+						return -(a[1].length - b[1].length);
+					});
+
+				$.each(names, function (i, pair) {
+					var name = pair[1];
+					if (value.substr(iValue, name.length).toLowerCase() === name.toLowerCase()) {
+						index = pair[0];
+						iValue += name.length;
+						return false;
+					}
+				});
+				if (index !== -1) {
+					return index + 1;
+				} else {
+					throw 'Unknown name at position ' + iValue;
+				}
+			},
+			// Confirm that a literal character matches the string value
+			checkLiteral = function() {
+				if (value.charAt(iValue) !== format.charAt(iFormat)) {
+					throw 'Unexpected literal at position ' + iValue;
+				}
+				iValue++;
+			};
+
+		for (iFormat = 0; iFormat < format.length; iFormat++) {
+			if (literal) {
+				if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
 					literal = false;
-				else
+				} else {
 					checkLiteral();
-			else
+				}
+			} else {
 				switch (format.charAt(iFormat)) {
 					case 'd':
 						day = getNumber('d');
@@ -1075,52 +1197,61 @@ $.extend(Datepicker.prototype, {
 						year = getNumber('y');
 						break;
 					case '@':
-						var date = new Date(getNumber('@'));
+						date = new Date(getNumber('@'));
 						year = date.getFullYear();
 						month = date.getMonth() + 1;
 						day = date.getDate();
 						break;
 					case '!':
-						var date = new Date((getNumber('!') - this._ticksTo1970) / 10000);
+						date = new Date((getNumber('!') - this._ticksTo1970) / 10000);
 						year = date.getFullYear();
 						month = date.getMonth() + 1;
 						day = date.getDate();
 						break;
 					case "'":
-						if (lookAhead("'"))
+						if (lookAhead("'")){
 							checkLiteral();
-						else
+						} else {
 							literal = true;
+						}
 						break;
 					default:
 						checkLiteral();
 				}
+			}
 		}
+
 		if (iValue < value.length){
-			var extra = value.substr(iValue);
+			extra = value.substr(iValue);
 			if (!/^\s+/.test(extra)) {
 				throw "Extra/unparsed characters found in date: " + extra;
 			}
 		}
-		if (year == -1)
+
+		if (year === -1) {
 			year = new Date().getFullYear();
-		else if (year < 100)
+		} else if (year < 100) {
 			year += new Date().getFullYear() - new Date().getFullYear() % 100 +
 				(year <= shortYearCutoff ? 0 : -100);
+		}
+
 		if (doy > -1) {
 			month = 1;
 			day = doy;
 			do {
-				var dim = this._getDaysInMonth(year, month - 1);
-				if (day <= dim)
+				dim = this._getDaysInMonth(year, month - 1);
+				if (day <= dim) {
 					break;
+				}
 				month++;
 				day -= dim;
 			} while (true);
 		}
-		var date = this._daylightSavingAdjust(new Date(year, month - 1, day));
-		if (date.getFullYear() != year || date.getMonth() + 1 != month || date.getDate() != day)
+
+		date = this._daylightSavingAdjust(new Date(year, month - 1, day));
+		if (date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day) {
 			throw 'Invalid date'; // E.g. 31/02/00
+		}
 		return date;
 	},
 
@@ -1170,41 +1301,49 @@ $.extend(Datepicker.prototype, {
 	 * @return  string - the date in the above format
 	 */
 	formatDate: function (format, date, settings) {
-		if (!date)
+		if (!date) {
 			return '';
-		var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
-		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
-		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
-		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
-		// Check whether a format character is doubled
-		var lookAhead = function(match) {
-			var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
-			if (matches)
-				iFormat++;
-			return matches;
-		};
-		// Format a number, with leading zero if necessary
-		var formatNumber = function(match, value, len) {
-			var num = '' + value;
-			if (lookAhead(match))
-				while (num.length < len)
-					num = '0' + num;
-			return num;
-		};
-		// Format a name, short or long as requested
-		var formatName = function(match, value, shortNames, longNames) {
-			return (lookAhead(match) ? longNames[value] : shortNames[value]);
-		};
-		var output = '';
-		var literal = false;
-		if (date)
-			for (var iFormat = 0; iFormat < format.length; iFormat++) {
-				if (literal)
-					if (format.charAt(iFormat) == "'" && !lookAhead("'"))
+		}
+
+		var iFormat,
+			dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort,
+			dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames,
+			monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort,
+			monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames,
+			// Check whether a format character is doubled
+			lookAhead = function(match) {
+				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
+				if (matches) {
+					iFormat++;
+				}
+				return matches;
+			},
+			// Format a number, with leading zero if necessary
+			formatNumber = function(match, value, len) {
+				var num = '' + value;
+				if (lookAhead(match)) {
+					while (num.length < len) {
+						num = '0' + num;
+					}
+				}
+				return num;
+			},
+			// Format a name, short or long as requested
+			formatName = function(match, value, shortNames, longNames) {
+				return (lookAhead(match) ? longNames[value] : shortNames[value]);
+			},
+			output = '',
+			literal = false;
+
+		if (date) {
+			for (iFormat = 0; iFormat < format.length; iFormat++) {
+				if (literal) {
+					if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
 						literal = false;
-					else
+					} else {
 						output += format.charAt(iFormat);
-				else
+					}
+				} else {
 					switch (format.charAt(iFormat)) {
 						case 'd':
 							output += formatNumber('d', date.getDate(), 2);
@@ -1233,36 +1372,43 @@ $.extend(Datepicker.prototype, {
 							output += date.getTime() * 10000 + this._ticksTo1970;
 							break;
 						case "'":
-							if (lookAhead("'"))
+							if (lookAhead("'")) {
 								output += "'";
-							else
+							} else {
 								literal = true;
+							}
 							break;
 						default:
 							output += format.charAt(iFormat);
 					}
+				}
 			}
+		}
 		return output;
 	},
 
 	/* Extract all possible characters from the date format. */
 	_possibleChars: function (format) {
-		var chars = '';
-		var literal = false;
-		// Check whether a format character is doubled
-		var lookAhead = function(match) {
-			var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
-			if (matches)
-				iFormat++;
-			return matches;
-		};
-		for (var iFormat = 0; iFormat < format.length; iFormat++)
-			if (literal)
-				if (format.charAt(iFormat) == "'" && !lookAhead("'"))
+		var iFormat,
+			chars = '',
+			literal = false,
+			// Check whether a format character is doubled
+			lookAhead = function(match) {
+				var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) === match);
+				if (matches) {
+					iFormat++;
+				}
+				return matches;
+			};
+
+		for (iFormat = 0; iFormat < format.length; iFormat++) {
+			if (literal) {
+				if (format.charAt(iFormat) === "'" && !lookAhead("'")) {
 					literal = false;
-				else
+				} else {
 					chars += format.charAt(iFormat);
-			else
+				}
+			} else {
 				switch (format.charAt(iFormat)) {
 					case 'd': case 'm': case 'y': case '@':
 						chars += '0123456789';
@@ -1270,14 +1416,17 @@ $.extend(Datepicker.prototype, {
 					case 'D': case 'M':
 						return null; // Accept anything
 					case "'":
-						if (lookAhead("'"))
+						if (lookAhead("'")) {
 							chars += "'";
-						else
+						} else {
 							literal = true;
+						}
 						break;
 					default:
 						chars += format.charAt(iFormat);
 				}
+			}
+		}
 		return chars;
 	},
 
@@ -1289,18 +1438,19 @@ $.extend(Datepicker.prototype, {
 
 	/* Parse existing date and initialise date picker. */
 	_setDateFromField: function(inst, noDefault) {
-		if (inst.input.val() == inst.lastVal) {
+		if (inst.input.val() === inst.lastVal) {
 			return;
 		}
-		var dateFormat = this._get(inst, 'dateFormat');
-		var dates = inst.lastVal = inst.input ? inst.input.val() : null;
-		var date, defaultDate;
-		date = defaultDate = this._getDefaultDate(inst);
-		var settings = this._getFormatConfig(inst);
+
+		var dateFormat = this._get(inst, 'dateFormat'),
+			dates = inst.lastVal = inst.input ? inst.input.val() : null,
+			defaultDate = this._getDefaultDate(inst),
+			date = defaultDate,
+			settings = this._getFormatConfig(inst);
+
 		try {
 			date = this.parseDate(dateFormat, dates, settings) || defaultDate;
 		} catch (event) {
-			this.log(event);
 			dates = (noDefault ? '' : dates);
 		}
 		inst.selectedDay = date.getDate();
@@ -1321,47 +1471,50 @@ $.extend(Datepicker.prototype, {
 	/* A date may be specified as an exact value or a relative one. */
 	_determineDate: function(inst, date, defaultDate) {
 		var offsetNumeric = function(offset) {
-			var date = new Date();
-			date.setDate(date.getDate() + offset);
-			return date;
-		};
-		var offsetString = function(offset) {
-			try {
-				return $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
-					offset, $.datepicker._getFormatConfig(inst));
-			}
-			catch (e) {
-				// Ignore
-			}
-			var date = (offset.toLowerCase().match(/^c/) ?
-				$.datepicker._getDate(inst) : null) || new Date();
-			var year = date.getFullYear();
-			var month = date.getMonth();
-			var day = date.getDate();
-			var pattern = /([+\-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g;
-			var matches = pattern.exec(offset);
-			while (matches) {
-				switch (matches[2] || 'd') {
-					case 'd' : case 'D' :
-						day += parseInt(matches[1],10); break;
-					case 'w' : case 'W' :
-						day += parseInt(matches[1],10) * 7; break;
-					case 'm' : case 'M' :
-						month += parseInt(matches[1],10);
-						day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
-						break;
-					case 'y': case 'Y' :
-						year += parseInt(matches[1],10);
-						day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
-						break;
+				var date = new Date();
+				date.setDate(date.getDate() + offset);
+				return date;
+			},
+			offsetString = function(offset) {
+				try {
+					return $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
+						offset, $.datepicker._getFormatConfig(inst));
 				}
-				matches = pattern.exec(offset);
-			}
-			return new Date(year, month, day);
-		};
-		var newDate = (date == null || date === '' ? defaultDate : (typeof date == 'string' ? offsetString(date) :
-			(typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : new Date(date.getTime()))));
-		newDate = (newDate && newDate.toString() == 'Invalid Date' ? defaultDate : newDate);
+				catch (e) {
+					// Ignore
+				}
+
+				var date = (offset.toLowerCase().match(/^c/) ?
+					$.datepicker._getDate(inst) : null) || new Date(),
+					year = date.getFullYear(),
+					month = date.getMonth(),
+					day = date.getDate(),
+					pattern = /([+\-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g,
+					matches = pattern.exec(offset);
+
+				while (matches) {
+					switch (matches[2] || 'd') {
+						case 'd' : case 'D' :
+							day += parseInt(matches[1],10); break;
+						case 'w' : case 'W' :
+							day += parseInt(matches[1],10) * 7; break;
+						case 'm' : case 'M' :
+							month += parseInt(matches[1],10);
+							day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
+							break;
+						case 'y': case 'Y' :
+							year += parseInt(matches[1],10);
+							day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
+							break;
+					}
+					matches = pattern.exec(offset);
+				}
+				return new Date(year, month, day);
+			},
+			newDate = (date == null || date === '' ? defaultDate : (typeof date === 'string' ? offsetString(date) :
+				(typeof date === 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : new Date(date.getTime()))));
+
+		newDate = (newDate && newDate.toString() === 'Invalid Date' ? defaultDate : newDate);
 		if (newDate) {
 			newDate.setHours(0);
 			newDate.setMinutes(0);
@@ -1379,22 +1532,26 @@ $.extend(Datepicker.prototype, {
 	 * @return  (Date) the corrected date
 	 */
 	_daylightSavingAdjust: function(date) {
-		if (!date) return null;
+		if (!date) {
+			return null;
+		}
 		date.setHours(date.getHours() > 12 ? date.getHours() + 2 : 0);
 		return date;
 	},
 
 	/* Set the date(s) directly. */
 	_setDate: function(inst, date, noChange) {
-		var clear = !date;
-		var origMonth = inst.selectedMonth;
-		var origYear = inst.selectedYear;
-		var newDate = this._restrictMinMax(inst, this._determineDate(inst, date, new Date()));
+		var clear = !date,
+			origMonth = inst.selectedMonth,
+			origYear = inst.selectedYear,
+			newDate = this._restrictMinMax(inst, this._determineDate(inst, date, new Date()));
+
 		inst.selectedDay = inst.currentDay = newDate.getDate();
 		inst.drawMonth = inst.selectedMonth = inst.currentMonth = newDate.getMonth();
 		inst.drawYear = inst.selectedYear = inst.currentYear = newDate.getFullYear();
-		if ((origMonth != inst.selectedMonth || origYear != inst.selectedYear) && !noChange)
+		if ((origMonth !== inst.selectedMonth || origYear !== inst.selectedYear) && !noChange) {
 			this._notifyChange(inst);
+		}
 		this._adjustInstDate(inst);
 		if (inst.input) {
 			inst.input.val(clear ? '' : this._formatDate(inst));
@@ -1413,8 +1570,8 @@ $.extend(Datepicker.prototype, {
 	 * they work with static code transformers like Caja.
 	 */
 	_attachHandlers: function(inst) {
-		var stepMonths = this._get(inst, 'stepMonths');
-		var id = '#' + inst.id.replace( /\\\\/g, "\\" );
+		var stepMonths = this._get(inst, 'stepMonths'),
+			id = '#' + inst.id.replace( /\\\\/g, "\\" );
 		inst.dpDiv.find('[data-handler]').map(function () {
 			var handler = {
 				prev: function () {
@@ -1448,29 +1605,36 @@ $.extend(Datepicker.prototype, {
 
 	/* Generate the HTML for the current state of the date picker. */
 	_generateHTML: function(inst) {
-		var today = new Date();
-		today = this._daylightSavingAdjust(
-			new Date(today.getFullYear(), today.getMonth(), today.getDate())); // clear time
-		var isRTL = this._get(inst, 'isRTL');
-		var showButtonPanel = this._get(inst, 'showButtonPanel');
-		var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');
-		var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');
-		var numMonths = this._getNumberOfMonths(inst);
-		var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');
-		var stepMonths = this._get(inst, 'stepMonths');
-		var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);
-		var currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
-			new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
-		var minDate = this._getMinMaxDate(inst, 'min');
-		var maxDate = this._getMinMaxDate(inst, 'max');
-		var drawMonth = inst.drawMonth - showCurrentAtPos;
-		var drawYear = inst.drawYear;
+		var maxDraw, prevText, prev, nextText, next, currentText, gotoDate,
+			controls, buttonPanel, firstDay, showWeek, dayNames, dayNamesMin,
+			monthNames, monthNamesShort, beforeShowDay, showOtherMonths,
+			selectOtherMonths, defaultDate, html, dow, row, group, col, selectedDate,
+			cornerClass, calender, thead, day, daysInMonth, leadDays, curRows, numRows,
+			printDate, dRow, tbody, daySettings, otherMonth, unselectable,
+			tempDate = new Date(),
+			today = this._daylightSavingAdjust(
+				new Date(tempDate.getFullYear(), tempDate.getMonth(), tempDate.getDate())), // clear time
+			isRTL = this._get(inst, 'isRTL'),
+			showButtonPanel = this._get(inst, 'showButtonPanel'),
+			hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext'),
+			navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat'),
+			numMonths = this._getNumberOfMonths(inst),
+			showCurrentAtPos = this._get(inst, 'showCurrentAtPos'),
+			stepMonths = this._get(inst, 'stepMonths'),
+			isMultiMonth = (numMonths[0] !== 1 || numMonths[1] !== 1),
+			currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
+				new Date(inst.currentYear, inst.currentMonth, inst.currentDay))),
+			minDate = this._getMinMaxDate(inst, 'min'),
+			maxDate = this._getMinMaxDate(inst, 'max'),
+			drawMonth = inst.drawMonth - showCurrentAtPos,
+			drawYear = inst.drawYear;
+
 		if (drawMonth < 0) {
 			drawMonth += 12;
 			drawYear--;
 		}
 		if (maxDate) {
-			var maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
+			maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
 				maxDate.getMonth() - (numMonths[0] * numMonths[1]) + 1, maxDate.getDate()));
 			maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
 			while (this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1)) > maxDraw) {
@@ -1483,53 +1647,63 @@ $.extend(Datepicker.prototype, {
 		}
 		inst.drawMonth = drawMonth;
 		inst.drawYear = drawYear;
-		var prevText = this._get(inst, 'prevText');
+
+		prevText = this._get(inst, 'prevText');
 		prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,
 			this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),
 			this._getFormatConfig(inst)));
-		var prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
+
+		prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
 			'<a class="ui-datepicker-prev ui-corner-all" data-handler="prev" data-event="click"' +
 			' title="' + prevText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>' :
 			(hideIfNoPrevNext ? '' : '<a class="ui-datepicker-prev ui-corner-all ui-state-disabled" title="'+ prevText +'"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>'));
-		var nextText = this._get(inst, 'nextText');
+
+		nextText = this._get(inst, 'nextText');
 		nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,
 			this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),
 			this._getFormatConfig(inst)));
-		var next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
+
+		next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
 			'<a class="ui-datepicker-next ui-corner-all" data-handler="next" data-event="click"' +
 			' title="' + nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>' :
 			(hideIfNoPrevNext ? '' : '<a class="ui-datepicker-next ui-corner-all ui-state-disabled" title="'+ nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>'));
-		var currentText = this._get(inst, 'currentText');
-		var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);
+
+		currentText = this._get(inst, 'currentText');
+		gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);
 		currentText = (!navigationAsDateFormat ? currentText :
 			this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
-		var controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" data-handler="hide" data-event="click">' +
+
+		controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" data-handler="hide" data-event="click">' +
 			this._get(inst, 'closeText') + '</button>' : '');
-		var buttonPanel = (showButtonPanel) ? '<div class="ui-datepicker-buttonpane ui-widget-content">' + (isRTL ? controls : '') +
+
+		buttonPanel = (showButtonPanel) ? '<div class="ui-datepicker-buttonpane ui-widget-content">' + (isRTL ? controls : '') +
 			(this._isInRange(inst, gotoDate) ? '<button type="button" class="ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all" data-handler="today" data-event="click"' +
 			'>' + currentText + '</button>' : '') + (isRTL ? '' : controls) + '</div>' : '';
-		var firstDay = parseInt(this._get(inst, 'firstDay'),10);
+
+		firstDay = parseInt(this._get(inst, 'firstDay'),10);
 		firstDay = (isNaN(firstDay) ? 0 : firstDay);
-		var showWeek = this._get(inst, 'showWeek');
-		var dayNames = this._get(inst, 'dayNames');
-		var dayNamesMin = this._get(inst, 'dayNamesMin');
-		var monthNames = this._get(inst, 'monthNames');
-		var monthNamesShort = this._get(inst, 'monthNamesShort');
-		var beforeShowDay = this._get(inst, 'beforeShowDay');
-		var showOtherMonths = this._get(inst, 'showOtherMonths');
-		var selectOtherMonths = this._get(inst, 'selectOtherMonths');
-		var defaultDate = this._getDefaultDate(inst);
-		var html = '';
-		for (var row = 0; row < numMonths[0]; row++) {
-			var group = '';
+
+		showWeek = this._get(inst, 'showWeek');
+		dayNames = this._get(inst, 'dayNames');
+		dayNamesMin = this._get(inst, 'dayNamesMin');
+		monthNames = this._get(inst, 'monthNames');
+		monthNamesShort = this._get(inst, 'monthNamesShort');
+		beforeShowDay = this._get(inst, 'beforeShowDay');
+		showOtherMonths = this._get(inst, 'showOtherMonths');
+		selectOtherMonths = this._get(inst, 'selectOtherMonths');
+		defaultDate = this._getDefaultDate(inst);
+		html = '';
+		dow;
+		for (row = 0; row < numMonths[0]; row++) {
+			group = '';
 			this.maxRows = 4;
-			for (var col = 0; col < numMonths[1]; col++) {
-				var selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));
-				var cornerClass = ' ui-corner-all';
-				var calender = '';
+			for (col = 0; col < numMonths[1]; col++) {
+				selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));
+				cornerClass = ' ui-corner-all';
+				calender = '';
 				if (isMultiMonth) {
 					calender += '<div class="ui-datepicker-group';
-					if (numMonths[1] > 1)
+					if (numMonths[1] > 1) {
 						switch (col) {
 							case 0: calender += ' ui-datepicker-group-first';
 								cornerClass = ' ui-corner-' + (isRTL ? 'right' : 'left'); break;
@@ -1537,6 +1711,7 @@ $.extend(Datepicker.prototype, {
 								cornerClass = ' ui-corner-' + (isRTL ? 'left' : 'right'); break;
 							default: calender += ' ui-datepicker-group-middle'; cornerClass = ''; break;
 						}
+					}
 					calender += '">';
 				}
 				calender += '<div class="ui-datepicker-header ui-widget-header ui-helper-clearfix' + cornerClass + '">' +
@@ -1546,48 +1721,49 @@ $.extend(Datepicker.prototype, {
 					row > 0 || col > 0, monthNames, monthNamesShort) + // draw month headers
 					'</div><table class="ui-datepicker-calendar"><thead>' +
 					'<tr>';
-				var thead = (showWeek ? '<th class="ui-datepicker-week-col">' + this._get(inst, 'weekHeader') + '</th>' : '');
-				for (var dow = 0; dow < 7; dow++) { // days of the week
-					var day = (dow + firstDay) % 7;
+				thead = (showWeek ? '<th class="ui-datepicker-week-col">' + this._get(inst, 'weekHeader') + '</th>' : '');
+				for (dow = 0; dow < 7; dow++) { // days of the week
+					day = (dow + firstDay) % 7;
 					thead += '<th' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end"' : '') + '>' +
 						'<span title="' + dayNames[day] + '">' + dayNamesMin[day] + '</span></th>';
 				}
 				calender += thead + '</tr></thead><tbody>';
-				var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
-				if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)
+				daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
+				if (drawYear === inst.selectedYear && drawMonth === inst.selectedMonth) {
 					inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
-				var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
-				var curRows = Math.ceil((leadDays + daysInMonth) / 7); // calculate the number of rows to generate
-				var numRows = (isMultiMonth ? this.maxRows > curRows ? this.maxRows : curRows : curRows); //If multiple months, use the higher number of rows (see #7043)
+				}
+				leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
+				curRows = Math.ceil((leadDays + daysInMonth) / 7); // calculate the number of rows to generate
+				numRows = (isMultiMonth ? this.maxRows > curRows ? this.maxRows : curRows : curRows); //If multiple months, use the higher number of rows (see #7043)
 				this.maxRows = numRows;
-				var printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
-				for (var dRow = 0; dRow < numRows; dRow++) { // create date picker rows
+				printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
+				for (dRow = 0; dRow < numRows; dRow++) { // create date picker rows
 					calender += '<tr>';
-					var tbody = (!showWeek ? '' : '<td class="ui-datepicker-week-col">' +
+					tbody = (!showWeek ? '' : '<td class="ui-datepicker-week-col">' +
 						this._get(inst, 'calculateWeek')(printDate) + '</td>');
-					for (var dow = 0; dow < 7; dow++) { // create date picker days
-						var daySettings = (beforeShowDay ?
+					for (dow = 0; dow < 7; dow++) { // create date picker days
+						daySettings = (beforeShowDay ?
 							beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);
-						var otherMonth = (printDate.getMonth() != drawMonth);
-						var unselectable = (otherMonth && !selectOtherMonths) || !daySettings[0] ||
+						otherMonth = (printDate.getMonth() !== drawMonth);
+						unselectable = (otherMonth && !selectOtherMonths) || !daySettings[0] ||
 							(minDate && printDate < minDate) || (maxDate && printDate > maxDate);
 						tbody += '<td class="' +
 							((dow + firstDay + 6) % 7 >= 5 ? ' ui-datepicker-week-end' : '') + // highlight weekends
 							(otherMonth ? ' ui-datepicker-other-month' : '') + // highlight days from other months
-							((printDate.getTime() == selectedDate.getTime() && drawMonth == inst.selectedMonth && inst._keyEvent) || // user pressed key
-							(defaultDate.getTime() == printDate.getTime() && defaultDate.getTime() == selectedDate.getTime()) ?
+							((printDate.getTime() === selectedDate.getTime() && drawMonth === inst.selectedMonth && inst._keyEvent) || // user pressed key
+							(defaultDate.getTime() === printDate.getTime() && defaultDate.getTime() === selectedDate.getTime()) ?
 							// or defaultDate is current printedDate and defaultDate is selectedDate
 							' ' + this._dayOverClass : '') + // highlight selected day
 							(unselectable ? ' ' + this._unselectableClass + ' ui-state-disabled': '') +  // highlight unselectable days
 							(otherMonth && !showOtherMonths ? '' : ' ' + daySettings[1] + // highlight custom dates
-							(printDate.getTime() == currentDate.getTime() ? ' ' + this._currentClass : '') + // highlight selected day
-							(printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)
+							(printDate.getTime() === currentDate.getTime() ? ' ' + this._currentClass : '') + // highlight selected day
+							(printDate.getTime() === today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)
 							((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') + // cell title
 							(unselectable ? '' : ' data-handler="selectDay" data-event="click" data-month="' + printDate.getMonth() + '" data-year="' + printDate.getFullYear() + '"') + '>' + // actions
 							(otherMonth && !showOtherMonths ? '&#xa0;' : // display for other months
 							(unselectable ? '<span class="ui-state-default">' + printDate.getDate() + '</span>' : '<a class="ui-state-default' +
-							(printDate.getTime() == today.getTime() ? ' ui-state-highlight' : '') +
-							(printDate.getTime() == currentDate.getTime() ? ' ui-state-active' : '') + // highlight selected day
+							(printDate.getTime() === today.getTime() ? ' ui-state-highlight' : '') +
+							(printDate.getTime() === currentDate.getTime() ? ' ui-state-active' : '') + // highlight selected day
 							(otherMonth ? ' ui-priority-secondary' : '') + // distinguish dates from other months
 							'" href="#">' + printDate.getDate() + '</a>')) + '</td>'; // display selectable date
 						printDate.setDate(printDate.getDate() + 1);
@@ -1601,7 +1777,7 @@ $.extend(Datepicker.prototype, {
 					drawYear++;
 				}
 				calender += '</tbody></table>' + (isMultiMonth ? '</div>' +
-							((numMonths[0] > 0 && col == numMonths[1]-1) ? '<div class="ui-datepicker-row-break"></div>' : '') : '');
+							((numMonths[0] > 0 && col === numMonths[1]-1) ? '<div class="ui-datepicker-row-break"></div>' : '') : '');
 				group += calender;
 			}
 			html += group;
@@ -1614,52 +1790,58 @@ $.extend(Datepicker.prototype, {
 	/* Generate the month and year header. */
 	_generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,
 			secondary, monthNames, monthNamesShort) {
-		var changeMonth = this._get(inst, 'changeMonth');
-		var changeYear = this._get(inst, 'changeYear');
-		var showMonthAfterYear = this._get(inst, 'showMonthAfterYear');
-		var html = '<div class="ui-datepicker-title">';
-		var monthHtml = '';
+
+		var inMinYear, inMaxYear, month, years, thisYear, determineYear, year, endYear,
+			changeMonth = this._get(inst, 'changeMonth'),
+			changeYear = this._get(inst, 'changeYear'),
+			showMonthAfterYear = this._get(inst, 'showMonthAfterYear'),
+			html = '<div class="ui-datepicker-title">',
+			monthHtml = '';
+
 		// month selection
-		if (secondary || !changeMonth)
+		if (secondary || !changeMonth) {
 			monthHtml += '<span class="ui-datepicker-month">' + monthNames[drawMonth] + '</span>';
-		else {
-			var inMinYear = (minDate && minDate.getFullYear() == drawYear);
-			var inMaxYear = (maxDate && maxDate.getFullYear() == drawYear);
+		} else {
+			inMinYear = (minDate && minDate.getFullYear() === drawYear);
+			inMaxYear = (maxDate && maxDate.getFullYear() === drawYear);
 			monthHtml += '<select class="ui-datepicker-month" data-handler="selectMonth" data-event="change">';
-			for (var month = 0; month < 12; month++) {
-				if ((!inMinYear || month >= minDate.getMonth()) &&
-						(!inMaxYear || month <= maxDate.getMonth()))
+			for ( month = 0; month < 12; month++) {
+				if ((!inMinYear || month >= minDate.getMonth()) && (!inMaxYear || month <= maxDate.getMonth())) {
 					monthHtml += '<option value="' + month + '"' +
-						(month == drawMonth ? ' selected="selected"' : '') +
+						(month === drawMonth ? ' selected="selected"' : '') +
 						'>' + monthNamesShort[month] + '</option>';
+				}
 			}
 			monthHtml += '</select>';
 		}
-		if (!showMonthAfterYear)
+
+		if (!showMonthAfterYear) {
 			html += monthHtml + (secondary || !(changeMonth && changeYear) ? '&#xa0;' : '');
+		}
+
 		// year selection
 		if ( !inst.yearshtml ) {
 			inst.yearshtml = '';
-			if (secondary || !changeYear)
+			if (secondary || !changeYear) {
 				html += '<span class="ui-datepicker-year">' + drawYear + '</span>';
-			else {
+			} else {
 				// determine range of years to display
-				var years = this._get(inst, 'yearRange').split(':');
-				var thisYear = new Date().getFullYear();
-				var determineYear = function(value) {
+				years = this._get(inst, 'yearRange').split(':');
+				thisYear = new Date().getFullYear();
+				determineYear = function(value) {
 					var year = (value.match(/c[+\-].*/) ? drawYear + parseInt(value.substring(1), 10) :
 						(value.match(/[+\-].*/) ? thisYear + parseInt(value, 10) :
 						parseInt(value, 10)));
 					return (isNaN(year) ? thisYear : year);
 				};
-				var year = determineYear(years[0]);
-				var endYear = Math.max(year, determineYear(years[1] || ''));
+				year = determineYear(years[0]);
+				endYear = Math.max(year, determineYear(years[1] || ''));
 				year = (minDate ? Math.max(year, minDate.getFullYear()) : year);
 				endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);
 				inst.yearshtml += '<select class="ui-datepicker-year" data-handler="selectYear" data-event="change">';
 				for (; year <= endYear; year++) {
 					inst.yearshtml += '<option value="' + year + '"' +
-						(year == drawYear ? ' selected="selected"' : '') +
+						(year === drawYear ? ' selected="selected"' : '') +
 						'>' + year + '</option>';
 				}
 				inst.yearshtml += '</select>';
@@ -1668,49 +1850,51 @@ $.extend(Datepicker.prototype, {
 				inst.yearshtml = null;
 			}
 		}
+
 		html += this._get(inst, 'yearSuffix');
-		if (showMonthAfterYear)
+		if (showMonthAfterYear) {
 			html += (secondary || !(changeMonth && changeYear) ? '&#xa0;' : '') + monthHtml;
+		}
 		html += '</div>'; // Close datepicker_header
 		return html;
 	},
 
 	/* Adjust one of the date sub-fields. */
 	_adjustInstDate: function(inst, offset, period) {
-		var year = inst.drawYear + (period == 'Y' ? offset : 0);
-		var month = inst.drawMonth + (period == 'M' ? offset : 0);
-		var day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) +
-			(period == 'D' ? offset : 0);
-		var date = this._restrictMinMax(inst,
-			this._daylightSavingAdjust(new Date(year, month, day)));
+		var year = inst.drawYear + (period === 'Y' ? offset : 0),
+			month = inst.drawMonth + (period === 'M' ? offset : 0),
+			day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) + (period === 'D' ? offset : 0),
+			date = this._restrictMinMax(inst, this._daylightSavingAdjust(new Date(year, month, day)));
+
 		inst.selectedDay = date.getDate();
 		inst.drawMonth = inst.selectedMonth = date.getMonth();
 		inst.drawYear = inst.selectedYear = date.getFullYear();
-		if (period == 'M' || period == 'Y')
+		if (period === 'M' || period === 'Y') {
 			this._notifyChange(inst);
+		}
 	},
 
 	/* Ensure a date is within any min/max bounds. */
 	_restrictMinMax: function(inst, date) {
-		var minDate = this._getMinMaxDate(inst, 'min');
-		var maxDate = this._getMinMaxDate(inst, 'max');
-		var newDate = (minDate && date < minDate ? minDate : date);
-		newDate = (maxDate && newDate > maxDate ? maxDate : newDate);
-		return newDate;
+		var minDate = this._getMinMaxDate(inst, 'min'),
+			maxDate = this._getMinMaxDate(inst, 'max'),
+			newDate = (minDate && date < minDate ? minDate : date);
+		return (maxDate && newDate > maxDate ? maxDate : newDate);
 	},
 
 	/* Notify change of month/year. */
 	_notifyChange: function(inst) {
 		var onChange = this._get(inst, 'onChangeMonthYear');
-		if (onChange)
+		if (onChange) {
 			onChange.apply((inst.input ? inst.input[0] : null),
 				[inst.selectedYear, inst.selectedMonth + 1, inst]);
+		}
 	},
 
 	/* Determine the number of months to show. */
 	_getNumberOfMonths: function(inst) {
 		var numMonths = this._get(inst, 'numberOfMonths');
-		return (numMonths == null ? [1, 1] : (typeof numMonths == 'number' ? [1, numMonths] : numMonths));
+		return (numMonths == null ? [1, 1] : (typeof numMonths === 'number' ? [1, numMonths] : numMonths));
 	},
 
 	/* Determine the current maximum date - ensure no time components are set. */
@@ -1730,24 +1914,27 @@ $.extend(Datepicker.prototype, {
 
 	/* Determines if we should allow a "next/prev" month display change. */
 	_canAdjustMonth: function(inst, offset, curYear, curMonth) {
-		var numMonths = this._getNumberOfMonths(inst);
-		var date = this._daylightSavingAdjust(new Date(curYear,
+		var numMonths = this._getNumberOfMonths(inst),
+			date = this._daylightSavingAdjust(new Date(curYear,
 			curMonth + (offset < 0 ? offset : numMonths[0] * numMonths[1]), 1));
-		if (offset < 0)
+
+		if (offset < 0) {
 			date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
+		}
 		return this._isInRange(inst, date);
 	},
 
 	/* Is the given date in the accepted range? */
 	_isInRange: function(inst, date) {
-		var minDate = this._getMinMaxDate(inst, 'min');
-		var maxDate = this._getMinMaxDate(inst, 'max');
-        var minYear = null;
-        var maxYear = null;
-        var years = this._get(inst, 'yearRange');
+		var yearSplit, currentYear,
+			minDate = this._getMinMaxDate(inst, 'min'),
+			maxDate = this._getMinMaxDate(inst, 'max'),
+			minYear = null,
+			maxYear = null,
+			years = this._get(inst, 'yearRange');
         if (years){
-            var yearSplit = years.split(':');
-            var currentYear = new Date().getFullYear();
+            yearSplit = years.split(':');
+            currentYear = new Date().getFullYear();
             minYear = parseInt(yearSplit[0], 10) + currentYear;
             maxYear = parseInt(yearSplit[1], 10) + currentYear;
         }
@@ -1761,7 +1948,7 @@ $.extend(Datepicker.prototype, {
 	/* Provide the configuration settings for formatting/parsing. */
 	_getFormatConfig: function(inst) {
 		var shortYearCutoff = this._get(inst, 'shortYearCutoff');
-		shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
+		shortYearCutoff = (typeof shortYearCutoff !== 'string' ? shortYearCutoff :
 			new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
 		return {shortYearCutoff: shortYearCutoff,
 			dayNamesShort: this._get(inst, 'dayNamesShort'), dayNames: this._get(inst, 'dayNames'),
@@ -1775,7 +1962,7 @@ $.extend(Datepicker.prototype, {
 			inst.currentMonth = inst.selectedMonth;
 			inst.currentYear = inst.selectedYear;
 		}
-		var date = (day ? (typeof day == 'object' ? day :
+		var date = (day ? (typeof day === 'object' ? day :
 			this._daylightSavingAdjust(new Date(year, month, day))) :
 			this._daylightSavingAdjust(new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
 		return this.formatDate(this._get(inst, 'dateFormat'), date, this._getFormatConfig(inst));
@@ -1791,15 +1978,23 @@ function bindHover(dpDiv) {
 	var selector = 'button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a';
 	return dpDiv.delegate(selector, 'mouseout', function() {
 			$(this).removeClass('ui-state-hover');
-			if (this.className.indexOf('ui-datepicker-prev') != -1) $(this).removeClass('ui-datepicker-prev-hover');
-			if (this.className.indexOf('ui-datepicker-next') != -1) $(this).removeClass('ui-datepicker-next-hover');
+			if (this.className.indexOf('ui-datepicker-prev') !== -1) {
+				$(this).removeClass('ui-datepicker-prev-hover');
+			}
+			if (this.className.indexOf('ui-datepicker-next') !== -1) {
+				$(this).removeClass('ui-datepicker-next-hover');
+			}
 		})
 		.delegate(selector, 'mouseover', function(){
 			if (!$.datepicker._isDisabledDatepicker( instActive.inline ? dpDiv.parent()[0] : instActive.input[0])) {
 				$(this).parents('.ui-datepicker-calendar').find('a').removeClass('ui-state-hover');
 				$(this).addClass('ui-state-hover');
-				if (this.className.indexOf('ui-datepicker-prev') != -1) $(this).addClass('ui-datepicker-prev-hover');
-				if (this.className.indexOf('ui-datepicker-next') != -1) $(this).addClass('ui-datepicker-next-hover');
+				if (this.className.indexOf('ui-datepicker-prev') !== -1) {
+					$(this).addClass('ui-datepicker-prev-hover');
+				}
+				if (this.className.indexOf('ui-datepicker-next') !== -1) {
+					$(this).addClass('ui-datepicker-next-hover');
+				}
 			}
 		});
 }
@@ -1807,9 +2002,11 @@ function bindHover(dpDiv) {
 /* jQuery extend now ignores nulls! */
 function extendRemove(target, props) {
 	$.extend(target, props);
-	for (var name in props)
-		if (props[name] == null)
+	for (var name in props) {
+		if (props[name] == null) {
 			target[name] = props[name];
+		}
+	}
 	return target;
 }
 
@@ -1832,14 +2029,16 @@ $.fn.datepicker = function(options){
 	}
 
 	var otherArgs = Array.prototype.slice.call(arguments, 1);
-	if (typeof options == 'string' && (options == 'isDisabled' || options == 'getDate' || options == 'widget'))
+	if (typeof options === 'string' && (options === 'isDisabled' || options === 'getDate' || options === 'widget')) {
 		return $.datepicker['_' + options + 'Datepicker'].
 			apply($.datepicker, [this[0]].concat(otherArgs));
-	if (options == 'option' && arguments.length == 2 && typeof arguments[1] == 'string')
+	}
+	if (options === 'option' && arguments.length === 2 && typeof arguments[1] === 'string') {
 		return $.datepicker['_' + options + 'Datepicker'].
 			apply($.datepicker, [this[0]].concat(otherArgs));
+	}
 	return this.each(function() {
-		typeof options == 'string' ?
+		typeof options === 'string' ?
 			$.datepicker['_' + options + 'Datepicker'].
 				apply($.datepicker, [this].concat(otherArgs)) :
 			$.datepicker._attachDatepicker(this, options);