有时候我们想在js里面使用加密，jQuery就提供了这样的插件，用法十分简单：
$(md("你想要加密的字符串"));
md5插件下载地址：http://plugins.jquery.com/project/md5
下面是我的简单例子
代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="Scripts/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="Scripts/jquery.md5.js"></script>
<script type="text/javascript">
alert($.md5("Hello"));
</script>
</head>
<body>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="Scripts/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="Scripts/jquery.md5.js"></script>
<script type="text/javascript">
alert($.md5("Hello"));
</script>
</head>
<body>
</body>
</html>
来源：https://www.cnblogs.com/alexis/archive/2010/03/15/1686203.html