Mine

		var left = helper.parent[0].offsetLeft;		var top = helper.parent[0].offsetTop;		if(event) {			// position the helper 15 pixel to bottom right, starting from mouse position			left = event.pageX + 15;			top = event.pageY + 15;			helper.parent.css({				left: left + 'px',				top: top + 'px'			});		}