<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="jquery-1.11.2.min.js"></script>
<style type="text/css">
.aa{ width:200px; height:200px; float:left; margin:5px; background-color:#3F6}
</style>
</head>
<body>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
<div class="aa">
</div>
</body>
<script type="text/javascript">
$(".aa").click(function(){
//所有元素背景色变成原来的
$(".aa").removeAttr("xz");
$(".aa").css("background-color","#3F6");
//找到点击了谁
$(this).attr("xz","1");
$(this).css("background-color","red");
})
$(".aa").mousemove(function(){
//所有元素背景色变成原来的
$(".aa").css("background-color","#3F6");
//找到点击了谁
$(this).css("background-color","yellow");
$("[xz='1']").css("background-color","red");
})
</script>
</html>