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<script type="text/javascript">
//Set the Agent ID here
//Please set the AgentID number that has been provided for you
var agentID="3693";
//validate a postcode...
function validate(pcode) {
var rx = /[A-Z]{1,2}[0-9R][0-9A-Z]? *[0-9][A-Z]{2}/ ;
var matches = rx.exec(pcode) ;
return (matches != null && pcode == matches[0]) ;
//redirect to Energyhelpline and a valid UK postcode...
function redir() {
var ehl_pcode= document.getElementById('ehl_postcode').value;
if (agentID !=null)
if (!validate(ehl_pcode.toUpperCase()))
alert('Please enter a valid UK postcode');
return false;
window.location = "" + agentID + "&postcode=" + ehl_pcode;
return false;


<div id="friPostodeBox">

<form id="friPostcodeForm" name="form1" redir();" action="">

<p>Save on your energy bills with Energyhelpline!</p>

<label id="friPostcodeLabel"><span>Enter your postcode</span>

<input type="text" name="ehl_postcode" id="ehl_postcode" ('Your postcode'==this.value) this.value=''" value="Your postcode" />


<input type="submit" name="friSubmit" id="friSubmit" value="Go" />