Javascript - Color box using URL or iframe

We have to use this script where the output will take from url,

Javascript:
========
<script>
function getParameterByName(url, name)
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec(url);
  if( results == null )
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

$(document).ready(function(){
$('.dialog-open').each(function() {
   $(this).colorbox({
     height: 600,
     width: 800,
     iframe: true,
     href: "contact?id=" + getParameterByName($(this).attr("href"), "id")
   });
});
</script>

HTML
=====
<a href='test.php?id=$id' class="dialog-open"> test </a> 
 
Source: http://www.jacklmoore.com/colorbox/