Mail Doğrulama

<script language=Javascript>
function regKontrol(pattern, value)
{
  r = new RegExp(pattern, "g");
  return r.test(value);
}

function formKontrol(form)
{
    patternEposta  = "^"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"@"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"[\.]"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"$";
       
    if ( !regKontrol(patternEposta,form.email.value))
    {
          alert("Lütfen Doğru Bir E-posta Adresi Giriniz.");
          form.email.value="";
          form.email.focus();
          return false;
    }
    return true;
}
</script>
<form method="post" action="form_isle.html" name="frmKayitFormu" onsubmit="return formKontrol(this);">

<table width="100%" cellpadding="6" cellspacing="0" border="0">
 <tr>
  <td>E-Posta: </td>
  <td><input type="text" name="email" maxlength="50"></td>
  <td><input type="submit" value=" Gönder "></td>
 </tr>
</table>

</form>