+ // 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 = jQuery.noop;
+ },
+
+ 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 };
+ },
+
+ setOffset: function( elem, options, i ) {
+ // set position first, in-case top/left are set even on static elem
+ if ( /static/.test( jQuery.curCSS( elem, "position" ) ) ) {
+ elem.style.position = "relative";
+ }
+ var curElem = jQuery( elem ),
+ curOffset = curElem.offset(),
+ curTop = parseInt( jQuery.curCSS( elem, "top", true ), 10 ) || 0,
+ curLeft = parseInt( jQuery.curCSS( elem, "left", true ), 10 ) || 0;
+
+ if ( jQuery.isFunction( options ) ) {
+ options = options.call( elem, i, curOffset );
+ }
+
+ var props = {
+ top: (options.top - curOffset.top) + curTop,
+ left: (options.left - curOffset.left) + curLeft
+ };
+
+ if ( "using" in options ) {
+ options.using.call( elem, props );
+ } else {
+ curElem.css( props );
+ }
+ }