请问我这段jscript验证mail地址的怎么错了?
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Shark后台管理系统</title>
</head>
<body>
<input type="text" name="email" value="">
<input type="button" value="验证Email" onClick="validateEmail(email)">
</body>
</html>
<script type="text/javascript" language="javascript">
function validateEmail(emailStr)
{
var re="^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$";
if(re.test(emailStr))
{
alert("有效email地址!");
}
else
{
alert("无效email地址!");
}
}
</script>
运行总是报20行错误