+if ( "getBoundingClientRect" in document.documentElement ) {
+ jQuery.fn.offset = function( options ) {
+ var elem = this[0];
+
+ if ( !elem || !elem.ownerDocument ) {
+ return null;
+ }
+
+ if ( options ) {
+ return this.each(function() {
+ jQuery.offset.setOffset( this, options );
+ });
+ }
+
+ 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( options ) {
+ var elem = this[0];
+
+ if ( !elem || !elem.ownerDocument ) {
+ return null;
+ }
+
+ if ( options ) {
+ return this.each(function() {
+ jQuery.offset.setOffset( this, options );
+ });
+ }
+
+ 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 ? defaultView.getComputedStyle( elem, null ) : elem.currentStyle,
+ top = elem.offsetTop, left = elem.offsetLeft;
+
+ while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
+ break;
+ }
+
+ computedStyle = defaultView ? defaultView.getComputedStyle(elem, null) : elem.currentStyle;
+ 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.nodeName)) ) {
+ top += parseFloat( computedStyle.borderTopWidth ) || 0;
+ left += parseFloat( computedStyle.borderLeftWidth ) || 0;
+ }
+
+ prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
+ }
+
+ if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" ) {
+ top += parseFloat( computedStyle.borderTopWidth ) || 0;
+ left += parseFloat( computedStyle.borderLeftWidth ) || 0;
+ }
+
+ prevComputedStyle = computedStyle;
+ }
+
+ if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" ) {
+ top += body.offsetTop;
+ left += body.offsetLeft;
+ }
+
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) {
+ top += Math.max( docElem.scrollTop, body.scrollTop );
+ left += Math.max( docElem.scrollLeft, body.scrollLeft );
+ }
+
+ return { top: top, left: left };
+ };
+}
+
+jQuery.offset = {
+ initialize: function() {
+ var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, td, bodyMarginTop = parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0,
+ html = '<div style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;"><div></div></div><table style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;" cellpadding="0" cellspacing="0"><tr><td></td></tr></table>';
+
+ jQuery.extend( container.style, { position: 'absolute', top: 0, left: 0, margin: 0, border: 0, width: '1px', height: '1px', visibility: 'hidden' } );
+
+ container.innerHTML = html;
+ body.insertBefore( container, body.firstChild );
+ innerDiv = container.firstChild;
+ checkDiv = innerDiv.firstChild;
+ td = innerDiv.nextSibling.firstChild.firstChild;
+
+ this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
+ this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
+
+ checkDiv.style.position = 'fixed', checkDiv.style.top = '20px';
+ // safari subtracts parent border width here which is 5px
+ this.supportsFixedPosition = (checkDiv.offsetTop === 20 || checkDiv.offsetTop === 15);
+ checkDiv.style.position = checkDiv.style.top = '';
+
+ innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
+ this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
+
+ this.doesNotIncludeMarginInBodyOffset = (body.offsetTop !== bodyMarginTop);
+
+ body.removeChild( container );
+ body = container = innerDiv = checkDiv = table = td = null;
+ jQuery.offset.initialize = function() {};
+ },
+
+ bodyOffset: function( body ) {
+ var top = body.offsetTop, left = body.offsetLeft;
+
+ jQuery.offset.initialize();
+
+ if ( jQuery.offset.doesNotIncludeMarginInBodyOffset ) {
+ top += parseFloat( jQuery.curCSS(body, 'marginTop', true) ) || 0;
+ left += parseFloat( jQuery.curCSS(body, 'marginLeft', true) ) || 0;
+ }
+
+ return { top: top, left: left };
+ },