<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">
function dosub(){
var s = document.getElementById("t").value;
var i = /[0-9]+/;
var str = /[A-Za-z]/;
var spec=/[,.<>{}~!@#$%^&*]/;
if(!str.test(s)){
alert("必须包含字母");
}
if(!i.test(s)){
alert("必须包含数字");
}
if(!spec.test(s)){
alert("必须包含特殊字符。例如:!@#$%^&* 其中一个或多个");
}
}
</script>
</head>
<body>
<input type="text" name="t" id="t"/>
<input type="button" value="提交" onclick="dosub()" />
</body>
</html>