-// The Offset Method
-// Originally By Brandon Aaron, part of the Dimension Plugin
-// http://jquery.com/plugins/project/dimensions
-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;
+if ( "getBoundingClientRect" in document.documentElement )
+ jQuery.fn.offset = function() {
+ var elem = this[0];
+ if ( !elem || !elem.ownerDocument ) return null;
+ if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem );
+ var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement,
+ clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
+ top = box.top + (self.pageYOffset || jQuery.support.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop,
+ left = box.left + (self.pageXOffset || jQuery.support.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
+ return { top: top, left: left };
+ };
+else
+ jQuery.fn.offset = function() {
+ var elem = this[0];
+ if ( !elem || !elem.ownerDocument ) return null;
+ if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem );
+ jQuery.offset.initialize();
+
+ var offsetParent = elem.offsetParent, prevOffsetParent = elem,
+ doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
+ body = doc.body, defaultView = doc.defaultView,
+ prevComputedStyle = defaultView.getComputedStyle(elem, null),
+ top = elem.offsetTop, left = elem.offsetLeft;
+
+ while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) break;
+ computedStyle = defaultView.getComputedStyle(elem, null);
+ top -= elem.scrollTop, left -= elem.scrollLeft;
+ if ( elem === offsetParent ) {
+ top += elem.offsetTop, left += elem.offsetLeft;
+ if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) )
+ top += parseFloat( computedStyle.borderTopWidth ) || 0,
+ left += parseFloat( computedStyle.borderLeftWidth ) || 0;
+ prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;