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<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("section").mouseover(function(){
$("section").css("background-color","yellow");
});
$("section").mouseout(function(){
$("section").css("background-color","#E9E9E4");
});
});
</script>
</head>
<body>
<section style="background-color:#E9E9E4">请把鼠标指针移动到这个段落上。</section>
</body>
</html>