Checking email fields

Davids2 · October 20th, 2003, 08:33 AM

Hi,

Does anyone have a bit of ASP to check a: whether an email address is valid,eg. contains characters and @ and nothing weird and b: checks a second field where the user re-enters the email address against the first. Looked and looked on the web but I can't find anything ... probably me :(

Thanks

Greg Griffiths · October 20th, 2003, 01:47 PM

There is no magic answer given the variety of possible email address formats, there are several validation routines - see http://www.google.com/search?sourcei...idation+asp%22 and http://www.google.com/search?sourcei...+validation%22 - which simply tell you that an address COULD be valid, but the only way to know for sure is to email it.

surendran · October 23rd, 2003, 01:51 AM

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Surendran</title>
</head>
<script language=javascript>
function ddd()
{
var theForm=document.form1
if(document.form1.mail.value =="")
{
alert("Please Enter Your Email Address");
document.form1.mail.focus ();
return
}

  else if (theForm.mail.value!= "")
  {

  var mail1=theForm.mail.value;
  var i1 = mail1.indexOf('@');
  var i2 = mail1.lastIndexOf('@');
  var i3 = mail1.indexOf('.');
  var i4 =(i1-i3);

  if (mail1.length<=5)
  {
  alert("Your E-mail address is too small");
  theForm.mail.focus();
  return ;
}

    if(i1==-1)
{
  alert(" E-mail address must have a '@' ");
  theForm.mail.focus();
return ;
  }
  if(i1<2)
{
  alert(" E-mail address invalid ");
  theForm.mail.focus();
return;
   }

    if(i3==-1)
  {
  alert(" E-mail address must have a '.' ");
  theForm.mail.focus();
return
  }
ch = mail1.charAt(mail1.length-1);
if (ch==".")
  {
    alert(" E-mail address cannot contain '.' in end");
    theForm.mail.focus();
    return
}
if(i1!=i2)
{
alert(" E-mail address cannot contain two '@' signs");
theForm.mail.focus();
return
  }
arr=mail1.split("@");
var i5=arr[1].indexOf('.');
if(i5==-1)
{
alert(" E-mail address must have a '.' after @ sign ");
theForm.mail.focus();
return
}

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvw xyzÆÅ ÅÅ½Å¡ÅÅ¾Å¸ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Ã¡Ã¢Ã£Ã¤Ã¥Ã¦Ã§Ã¨Ã ©ÃªÃ«Ã¬ÃÃ®Ã¯Ã°Ã±Ã²Ã³Ã´ÃµÃ¶Ã¸Ã¹ÃºÃ»Ã¼Ã½Ã¾012345678 9-_.@";
  var checkStr = theForm.mail.value;
  var allValid = true;
  for (i = 0; i < checkStr.length; i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0; j < checkOK.length; j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("Please enter only letter, digit and \"@\" characters in the \"E-mail\" field.");
    theForm.mail.focus();
    return
  }
  }
document.form1 .action ="http://www.mathi.8m.con"
document.form1 .submit ();
}
//-->
</script>
<body>

<form name=form1 method="POST">
<p align="center"><input type="text" name="mail" size="20"><br>
<input type="button" onclick="ddd()" value="Submit" name="B1"></p>
<p align="center">Hello Click Submit button<br>
visit my web <a href="http://www.mathi.8m.com">http://www.mathi.8m.com</a></p>
</form>
</body>

</html>