Js 正则信箱验证 _JavaScript

Js 正则邮箱验证

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>

<BODY>
<script language="javascript">
function check(){
var email=document.getElementById("email").value;
var isemail=(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)
    if (email=="")
    {
alert("请输入您的邮箱!");
return false;
    }
if (email.length>25)
{
alert("长度太长");
return false
}
if (!isemail.test(email))
{
     alert("不是邮箱");
   return false;
}

}

</script>
<FORM METHOD=POST ACTION="" onsubmit="return check()">
<INPUT TYPE="text" NAME="email"><INPUT TYPE="submit">
</FORM>


</BODY>
</HTML>

Js 正则 信箱验证

Js 正则信箱验证