$(function(){
	var boxes = $("#boxes");
	boxes.find("li").each(function(){
		var thelink = $(this).find("a");
		thelink.css({"backgroundPosition":"0 0"});
		var overlay = $(document.createElement("span")).css({"backgroundImage":thelink.css("backgroundImage"),"opacity":0,"backgroundPosition":"left bottom"}).appendTo($(this)).addClass("overlay");
		$(this).hover(function(){
			overlay.stop().animate({"opacity":1});
		},function(){
			overlay.stop().animate({"opacity":0});
		});
		$(this).click(function(){
			window.location = thelink.attr("href");
		});
	});
});