--- /dev/null
+jQuery.fn.offset = function() {
+ var left = 0, top = 0, elem = this[0], results;
+
+ if ( elem ) with ( jQuery.browser ) {
+ var absolute = jQuery.css(elem, "position") == "absolute",
+ parent = elem.parentNode,
+ offsetParent = elem.offsetParent,
+ doc = elem.ownerDocument,
+ safari2 = safari && !absolute && parseInt(version) < 522;
+
+ // Use getBoundingClientRect if available
+ if ( elem.getBoundingClientRect ) {
+ box = elem.getBoundingClientRect();
+
+ // Add the document scroll offsets
+ add(
+ box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+ box.top + Math.max(doc.documentElement.scrollTop, doc.body.scrollTop)
+ );
+
+ // IE adds the HTML element's border, by default it is medium which is 2px
+ // IE 6 and IE 7 quirks mode the border width is overwritable by the following css html { border: 0; }
+ // IE 7 standards mode, the border is always 2px
+ if ( msie ) {
+ var border = jQuery("html").css("borderWidth");
+ border = (border == "medium" || jQuery.boxModel && parseInt(version) >= 7) && 2 || border;
+ add( -border, -border );
+ }
+
+ // Otherwise loop through the offsetParents and parentNodes
+ } else {
+
+ // Initial element offsets
+ add( elem.offsetLeft, elem.offsetTop );
+
+ // Get parent offsets
+ while ( offsetParent ) {
+ // Add offsetParent offsets
+ add( offsetParent.offsetLeft, offsetParent.offsetTop );
+
+ // Mozilla and Safari > 2 does not include the border on offset parents
+ // However Mozilla adds the border for table cells
+ if ( mozilla && /^t[d|h]$/i.test(parent.tagName) || !safari2 )
+ border( offsetParent );
+
+ // Safari <= 2 doubles body offsets with an absolutely positioned element or parent
+ if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" )
+ absolute = true;
+
+ // Get next offsetParent
+ offsetParent = offsetParent.offsetParent;
+ }
+
+ // Get parent scroll offsets
+ while ( parent.tagName && /^body|html$/i.test(parent.tagName) ) {
+ // Work around opera inline/table scrollLeft/Top bug
+ if ( /^inline|table-row.*$/i.test(jQuery.css(parent, "display")) )
+ // Subtract parent scroll offsets
+ add( -parent.scrollLeft, -parent.scrollTop );
+
+ // Mozilla does not add the border for a parent that has overflow != visible
+ if ( mozilla && jQuery.css(parent, "overflow") != "visible" )
+ border( parent );
+
+ // Get next parent
+ parent = parent.parentNode;
+ }
+
+ // Safari doubles body offsets with an absolutely positioned element or parent
+ if ( safari && absolute )
+ add( -doc.body.offsetLeft, -doc.body.offsetTop );
+ }
+
+ // Return an object with top and left properties
+ results = { top: top, left: left };
+ }
+
+ return results;
+
+ function border(elem) {
+ add( jQuery.css(elem, "borderLeftWidth"), jQuery.css(elem, "borderTopWidth") );
+ }
+
+ function add(l, t) {
+ left += parseInt(l) || 0;
+ top += parseInt(t) || 0;
+ }
+};