In case you cannot get the above script to work. I have used a method that was on Eric Hollebone's site, which doesn't seem to be accessible anyore. It dynamically generates the iframe with the url parameters that are on the parent URL. You will need to edit the bolded values.
<!-- add this to the HEAD section of the html page -->
<script type="text/javascript" language="Javascript">
// basic js, not using jQuery
// get current url parameters and dynamically construct the iframe's URL with those parameters
// and push it into the div with the id of iframeDiv
function loadiframe() {
// set document.domain to allow in-domain javascript access
document.domain=‘your domain name’;
// setup your iframe URL
var siframeSrc = '<iframe src=“Your landing page url, make sure to use http://;
// get the page's URL and look for the URL parameter delimiter "?"
sUrl = window.location.href;
if ((sUrl != null) && (sUrl != "") && (sUrl.search(/\?/) != -1)) {
// add the page's parameters to the iframe's URL
siframeSrc += sUrl.slice(sUrl.search(/\?/));
}
// add iframe options
// make sure to adjust the height and width of the iframe
siframeSrc += '"name="iframeDiv" id="iframeDiv" frameborder="0" height="580" width="555" scrolling="no" frameborder="0" marginwidth="0" frameborder="0" seamless></iframe>';
// inject the iframe code into the div
document.getElementById('iframeDiv').innerHTML=siframeSrc;
}
</script>
<!-- add the onload=""loadiframe();" TO the HTML BODY tag -->
<!-- EXAMPLE: -->
<body onload="loadiframe();">
<!-- add the DIV tag within the BODY section of the page -->
<div id="iframeDiv"></div>