function fetch_offset( object ) {
		var obj = document.getElementById(object);
		var left_offset = obj.offsetLeft;
		var top_offset = obj.offsetTop;

		while ((obj = obj.offsetParent) != null)
		{
			left_offset += obj.offsetLeft;
			top_offset += obj.offsetTop;
		}
		return { 'left' : left_offset, 'top' : top_offset };
	}