Verify E-mail Address

William Bontrager Jan 12, 2009

General

Collecting e-mail addresses in a form are important as they are generally the only method of contacting the user. This script will verify an e-mail address is entered correctly by requiring the user to re-enter the address, checking to make sure there is no typographical error. This script can also be used for passwords or other information that must be verified before being submitted.

Notes

Created by: William Bontrager
Web Site: http://www.willmaster.com/
Posted: January 12, 2009

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: verifyAddress.js

/* This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com
Created by: William Bontrager | http://www.willmaster.com/Licensed under: U.S. Copyright
 */

function ErrorCheck() {
  var formname = "myform";
  var fieldwithlist = "identicalfields";
  var er = new String();
  var tempstring = eval("document."+formname+"."+fieldwithlist+".value");

  if(tempstring.length > 1) {
    var idi = tempstring.split(',');
    var ts0 = eval("document."+formname+"."+idi[0]+".value");
    var ts1 = eval("document."+formname+"."+idi[1]+".value");
    if(ts0 != ts1) { er = 'The e-mail addresses do not match. Please re-enter them again.'; }
  }

  if(er.length > 0) {
    alert(er);
    return false;
  }

  return true;
}

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="verifyAddress.js"></script>

Body

Paste this code into the BODY section of your HTML document


<form name="myform" onsubmit="return ErrorCheck();" method="post" action="">
<input type="hidden" name="identicalfields" value="email,emailagain">
<p style="width:300px; text-align:right;">Email <input type="text" name="email" size="22">
<br>
Type again <input type="text" name="emailagain" size="22">
</p>
<p style="width:300px; text-align:center;">
<input type="submit">
</p>
</form>

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