<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www./1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>index</title>
<style type="text/css">
*{ margin:0; padding:0}
div{ margin:0 auto}
ul{ list-style:none}
li{ margin:4px;}
.te{ background:#F00}
</style>
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<script type="text/javascript">
$(function(){
$("#button").click(function(){
//获取包集合里边特定元素的下标，
var xiabiao=$("img").index($("img#find")[0])
alert(xiabiao)
})
})
</script>
</head>
<body>
<img src="#" />
<img src="#" />
<img src="#" />
<img src="#" id="find"/>
<img src="#" />
<input type="button" value="ceshi" id="button"/>
</div>
</body>
</html>
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