function getQueryVariable(variable)
{
       var query = window.location.search.substring(1);
       var vars = query.split("&");
       for (var i=0;i<vars.length;i++) {
               var pair = vars[i].split("=");
               if(pair[0] == variable){return pair[1];}
       }
       return(false);
}

Example URL:

http://www.example.com/index.php?id=1&image=awesome.jpg

Calling getQueryVariable("id") – would return “1”.
Calling getQueryVariable("image") – would return “awesome.jpg”.

Option 2:

<script type="text/javascript">
 function urldecode(str) {
  return decodeURIComponent((str + '').replace(/\+/g, '%20'))
 }
 function getUrlVars() {
  var vars = [], hash;
  var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&')
  for (var i = 0; i < hashes.length; i++) {
   hash = hashes[i].split('=')
   vars.push(hash[0])
   vars[hash[0]] = hash[1]
  }
  return vars;
 }
 var dlink = getUrlVars()["dlink"]; 

 if (dlink != '') {
	 $('#dlink').attr("href", subs);
 }
 $(".links").each(function() {
    var _href = $(this).attr("href");
    $(this).attr("href", _href + "?dlink=" + dlink);
 });
</script>