Grab Parameters From Tracking URL And Append Them To A Link On Your Site For Further Use.

gistfile1.js

function GetURLParameter(sParam){
    var sPageURL = window.location.search.substring(1);
    var sURLVariables = sPageURL.split('&');
    for (var i = 0; i < sURLVariables.length; i++){
        var sParameterName = sURLVariables[i].split('=');
        if (sParameterName[0] == sParam){
            return sParameterName[1];
        }
    }
}

gistfile2.js

var campaign = GetURLParameter('utm_campaign'),
    medium = GetURLParameter('utm_medium'),
    source = GetURLParameter('utm_source');

gistfile3.js

$("a.mentorsignup").each(function() {
   var _href = $(this).attr("href");
   if (campaign === undefined) {
        null;
   } else {
        $(this).attr("href", _href + '?utm_campaign=' + campaign + '&utm_medium=' + medium + '&utm_source=' + source);
   }
});