+ var elem = this[0],
+
+ // Get *real* offsetParent
+ offsetParent = this.offsetParent(),
+
+ // Get correct offsets
+ offset = this.offset(),
+ parentOffset = /^body|html$/i.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
+
+ // Subtract element margins
+ // note: when an element has margin: auto the offsetLeft and marginLeft
+ // are the same in Safari causing offset.left to incorrectly be 0
+ offset.top -= parseFloat( jQuery.curCSS(elem, "marginTop", true) ) || 0;
+ offset.left -= parseFloat( jQuery.curCSS(elem, "marginLeft", true) ) || 0;
+
+ // Add offsetParent borders
+ parentOffset.top += parseFloat( jQuery.curCSS(offsetParent[0], "borderTopWidth", true) ) || 0;
+ parentOffset.left += parseFloat( jQuery.curCSS(offsetParent[0], "borderLeftWidth", true) ) || 0;
+
+ // Subtract the two offsets
+ return {
+ top: offset.top - parentOffset.top,
+ left: offset.left - parentOffset.left
+ };