jQuery.fn.reposition = function(left, top) {
	var $target = $(this);
	var width 	= $target.outerWidth();
	var height 	= $target.outerHeight();
	var rightEdge 	= width + left;
	var bottomEdge 	= height + top - $(window).scrollTop();
		
	if(rightEdge > $(window).width())
		left = left - width;
	if(bottomEdge > $(window).height())
		top = top - height;	
	
	$target.css("position", "absolute");
	$target.css("left", left);
	$target.css("top", top);
}