示例代码如下：
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<html>
<head>
<mce:script language="Javascript1.2"><!--
function verifyAddress(obj)
{
var email = obj.email.value;
var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
flag = pattern.test(email);
if(flag)
{
alert("恭喜您！您填写的邮箱地址是正确的！");
return true;
}
else
{
alert("请再试一次");
return false;
}
}
// --></mce:script>
</head>
<body>
<form onSubmit="return verifyAddress(this);">
<input name="email" type="text">
<input type="submit">
</form>
</body>
</html>
原文来自http://blog.csdn.net/cyanapple_wen/article/details/5421412