提供一个简单的例子：
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<SCRIPT language=javascript src='jshash-2.2/md5.js'
type=text/javascript></SCRIPT>
</HEAD>
<form onsubmit="pwd.value =hex_md5(pwd.value)" >
<input type='password' name='pwd'></input>
<input type='submit'></input>
</form>
<BODY>
</BODY>
</HTML>
调用hex_md5(pwd.value)来加密提交
jshash-2.2包到http://pajhome.org.uk/crypt/md5/scripts.html下载
a href="#"> 点击链接后，页面会向上滚到页首，# 默认锚点为 #TOP
<a href="javascript:void(0)" onClick="window.open()"> 点击链接后，页面不动，只打开链接
<a href="#" onclick="javascript:return false;"> 作用同上，不同浏览器会有差异。
点击链接后，不想使页面滚到页首，就用href="javascript:v ......
