-// 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 parent = elem.parentNode,
- offsetChild = elem,
- offsetParent = elem.offsetParent,
- doc = elem.ownerDocument,
- safari2 = safari && parseInt(version) < 522 && !/adobeair/i.test(userAgent),
- css = jQuery.curCSS,
- fixed = css(elem, "position") == "fixed";
-
- // Use getBoundingClientRect if available
- if ( elem.getBoundingClientRect ) {
- var 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 7 quirks mode the border width is overwritable by the following css html { border: 0; }
- // IE 7 standards mode, the border is always 2px
- // This border/offset is typically represented by the clientLeft and clientTop properties
- // However, in IE6 and 7 quirks mode the clientLeft and clientTop properties are not updated when overwriting it via CSS
- // Therefore this method will be off by 2px in IE while in quirksmode
- add( -doc.documentElement.clientLeft, -doc.documentElement.clientTop );
-
- // 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 or table cells
- if ( mozilla && !/^t(able|d|h)$/i.test(offsetParent.tagName) || safari && !safari2 )
- border( offsetParent );
-
- // Add the document scroll offsets if position is fixed on any offsetParent
- if ( !fixed && css(offsetParent, "position") == "fixed" )
- fixed = true;
-
- // Set offsetChild to previous offsetParent unless it is the body element
- offsetChild = /^body$/i.test(offsetParent.tagName) ? offsetChild : offsetParent;
- // Get next offsetParent
- offsetParent = offsetParent.offsetParent;
- }
-
- // Get parent scroll offsets
- while ( parent && parent.tagName && !/^body|html$/i.test(parent.tagName) ) {
- // Remove parent scroll UNLESS that parent is inline or a table to work around Opera inline/table scrollLeft/Top bug
- if ( !/^inline|table.*$/i.test(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 && 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;