一個用戶註冊常用表單驗證

 一個用戶註冊常用表單驗證...
<script Language="JavaScript" Type="text/javascript">
<!--
function Validator(theForm)
{

if (theForm.Username.value == "")
{
    alert("請輸入用戶名!");
    theForm.Username.focus();
    return (false);
}

if (theForm.photofold.value =="")
{
    alert("請輸入相冊名!");
    theForm.photofold.focus();
    return (false);
}

if (theForm.pass.value == "")
{
    alert("請輸入密碼!");
    theForm.pass.focus();
    return (false);
}

if (theForm.pass.value.length < 6)
{
    alert("密碼請至少輸入 6 個字符。");
    theForm.pass.focus();
    return (false);
}

   if (theForm.pass.value !== theForm.repass.value)
{
    alert("兩次輸入的密碼不一致!");
    theForm.pass.focus();
    return (false);
}

    if (theForm.email.value == "")
{
    alert("請輸入您的郵箱地址!");
    theForm.pass.focus();
    return (false);
}
else
{
    if (theForm.email.value.charAt(0)=="." ||       
         theForm.email.value.charAt(0)=="@"||      
         theForm.email.value.indexOf('@', 0) == -1 ||
         theForm.email.value.indexOf('.', 0) == -1 ||
         theForm.email.value.lastIndexOf("@")==theForm.email.value.length-1 ||
         theForm.email.value.lastIndexOf(".")==theForm.email.value.length-1)
     {
      alert("Email地址格式不正確！");
      theForm.email.focus();
      return false;
      }
   }

return (true);
}
//--></script>

<form action="adm_login.asp" method="POST" name="FormReg" id="FormReg" οnsubmit="return Validator(this)" language="JavaScript">

提交按鈕:

<input name="FormReg" type="submit" value="提 交">