Alphanumeric Validation Function

This script function will help you to validate a string / character for alphanumeric values.

Features

The javascript function will return false when the string that is passed contains character other than alphanumeric.
It returns true on correct validation.
Just copy the code in to your page and use it.

Preview

Downloads

<script type="text/javascript">
function alphanumeric(alphane)
{
var numaric = alphane;
for(var j=0; j<numaric.length; j++)
{
var alphaa = numaric.charAt(j);
var hh = alphaa.charCodeAt(0);
if((hh > 47 && hh<58) || (hh > 64 && hh<91) || (hh > 96 && hh<123))
{
}else
{
alert("Your Alpha Numeric Test Failed"); return false;
}
}
alert("Your Alpha Numeric Test Passed");
return true;
}
</script>

Release Date - 15-12-2004
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For customization of this script or any script development, mail to support@hscripts.com

Usage

Here we have explained with a form
Creating the form using following HTML code

�<form name="test" onSubmit="return alphanumeric(test.mailf.value)">
    <input name=mailf type=text>
    <input type=submit value=validate>      
    </form>