Regular Expression Validator

This is a simple application of the Javascript Regular Expression matcher.
Digg it!

RegExp
String

Try some regular expressions:

• Email Address
• Random sequence of a,b characters
• IP address

Here you find the code. If you need an explanation, comment below!

<script language="javascript">
function regexMatch()
{
  var isIE = (window.ActiveXObject)?true:false;
  var attributeClass = (isIE)?"className":"class";

 var t1 = document.getElementById("regexField");
 var t2 = document.getElementById("string");
 var strPattern = "^"+t1.value+"$";
 var oTest = t2.value;

 var oREGEXP = new RegExp(strPattern);
 if (oREGEXP.test(oTest))
 {
    t2.setAttribute(attributeClass,"right");
    }
 else
 {
    t2.setAttribute(attributeClass,"wrong");
    }
}
</script>

<style>
.right{background-color:#33FF33;}
.wrong{background-color:#FF5555;}
</style>


<form name="formRegEx" onSubmit="javascript:regexMatch(); return false;">
   <input type="text" id="regexField"/>
   <input type="text" id="string" />
   <input type="button" onClick="javascript:regexMatch();" value="check"/>
</form>