<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css">
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<![endif]-->
<meta http-equiv="X-UA-Compatible" content="IE=Edge，chrome=1">
<style>
#panel {
width: 200px;
margin: 200px auto;
border: 1px solid #8E2C2D;
background-color: brown;
text-align: center;
}
</style>
<script>
$(document).ready(function(){
var kk=$(".panel-body");
var flag=true;
$("#panel").click(function(){
if(mm==true){
kk.hide();
flag=false;
}
else{
kk.show();
flag=true;
}
})
})
</script>
</head>
<body>
<div class="panel" id="panel">
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<div class="panel-body">
Hello world!
</div>
</div>
</body>
</html>
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