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JavaScript - Data Validation between two fields

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Join Date: Aug 2008

Posts: 3

Reputation: chry_15 is an unknown quantity at this point

Solved Threads: 0

chry_15

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Newbie Poster

JavaScript - Data Validation between two fields

Aug 17th, 2008

Hi everyone,

I'm a newbbie on javascript... I'm trying to develope a js to compare the first two letters of two fields... Any help would be appritiated!!!!

Thanks
Chris

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Join Date: Aug 2008

Posts: 381

Reputation: langsor is an unknown quantity at this point

Solved Threads: 33

langsor

Offline

Posting Whiz

Re: JavaScript - Data Validation between two fields

Aug 19th, 2008

Have a look at this

 Help with Code Tags 
 JavaScript / DHTML / AJAX Syntax (Toggle Plain Text) 
<html>
<head>
<script type="text/javascript">
function compare () {
  var one = document.getElementById('one');
  var two = document.getElementById('two');
  if ( one.value.substring(0,1) == two.value.substring(0,1) ) {
    alert( 'same letter, same case' );
  } else if ( one.value.substring(0,1).toLowerCase() == 
              two.value.substring(0,1).toLowerCase() ) {
    alert( 'same letter, different case' );
  } else {
    alert( 'different letters' );
  }
}
</script>
</head>
<body>
<form onsubmit="compare()">
  <input id="one" type="text" />
  <input id="two" type="text" />
  <input type="submit" />
</form>
</body>
</html>
<html>
<head>
<script type="text/javascript">
function compare () {
  var one = document.getElementById('one');
  var two = document.getElementById('two');
  if ( one.value.substring(0,1) == two.value.substring(0,1) ) {
    alert( 'same letter, same case' );
  } else if ( one.value.substring(0,1).toLowerCase() == 
              two.value.substring(0,1).toLowerCase() ) {
    alert( 'same letter, different case' );
  } else {
    alert( 'different letters' );
  }
}
</script>
</head>
<body>
<form onsubmit="compare()">
  <input id="one" type="text" />
  <input id="two" type="text" />
  <input type="submit" />
</form>
</body>
</html>

Hope it helps