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diff --git a/ui/jquery.effects.drop.js b/ui/jquery.effects.drop.js
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+++ b/ui/jquery.effects.drop.js
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+/*
+ * jQuery UI Effects Drop @VERSION
+ *
+ * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
+ * Dual licensed under the MIT (MIT-LICENSE.txt)
+ * and GPL (GPL-LICENSE.txt) licenses.
+ *
+ * http://docs.jquery.com/UI/Effects/Drop
+ *
+ * Depends:
+ *	jquery.effects.core.js
+ */
+(function($) {
+
+$.effects.drop = function(o) {
+
+	return this.queue(function() {
+
+		// Create element
+		var el = $(this), props = ['position','top','left','opacity'];
+
+		// Set options
+		var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode
+		var direction = o.options.direction || 'left'; // Default Direction
+
+		// Adjust
+		$.effects.save(el, props); el.show(); // Save & Show
+		$.effects.createWrapper(el); // Create Wrapper
+		var ref = (direction == 'up' || direction == 'down') ? 'top' : 'left';
+		var motion = (direction == 'up' || direction == 'left') ? 'pos' : 'neg';
+		var distance = o.options.distance || (ref == 'top' ? el.outerHeight({margin:true}) / 2 : el.outerWidth({margin:true}) / 2);
+		if (mode == 'show') el.css('opacity', 0).css(ref, motion == 'pos' ? -distance : distance); // Shift
+
+		// Animation
+		var animation = {opacity: mode == 'show' ? 1 : 0};
+		animation[ref] = (mode == 'show' ? (motion == 'pos' ? '+=' : '-=') : (motion == 'pos' ? '-=' : '+=')) + distance;
+
+		// Animate
+		el.animate(animation, { queue: false, duration: o.duration, easing: o.options.easing, complete: function() {
+			if(mode == 'hide') el.hide(); // Hide
+			$.effects.restore(el, props); $.effects.removeWrapper(el); // Restore
+			if(o.callback) o.callback.apply(this, arguments); // Callback
+			el.dequeue();
+		}});
+
+	});
+
+};
+
+})(jQuery);