-// 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 ( !(mozilla && elem == document.body) && 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 {
+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 );
+ }