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