Enhance specific links with incoming query string parameters

Enhance Links

(function() {

  var domains = ["stackoverflow.com", "google.ca", "abc.org"];
  var ready = function(a,b,c){b=document,c='addEventListener';b[c]?b[c]('DOMContentLoaded',a):window.attachEvent('onload',a)}

  var getQueryString = function() {
    var qs = document.location.search;
    var full = "";
    var partial = "";
    if(qs !== null && qs !== "") {
      full = qs;
      partial = qs.substring(1);
    }
    return {
      full: full,
      partial: partial,
      hasValue: function() {
        return this.full !== "" && this.partial !== "";
      }
    };
  };

  var qs = getQueryString();

  var hasDomain = function(href) {
    if(href !== null && href !== "") {
      for(var i=0; i<domains.length; i++) {
        if(href.indexOf(domains[i]) != -1)
          return true;
      }
    }
    return false;
  };

  var getLinksToProcess = function() {
    var links = document.body.getElementsByTagName("a");
    var process = [];
    for(var i=0; i<links.length; i++) {
      if(hasDomain(links[i].href)) {
        process.push(links[i]);
      }
    }
    return process;
  };

  var updatelinks = function() {
    var links = getLinksToProcess();
    for(var i=0; i<links.length; i++) {
      if(links[i].href.indexOf("?") != -1)
        links[i].href = links[i].href + "&" + qs.partial;
      else
        links[i].href = links[i].href + qs.full;
    }
  };

  if(qs.hasValue())
    ready(updatelinks);
})();


//Minified
(function(){var e=["stackoverflow.com","google.com","abc.org"];var t=function(e,t,n){t=document,n="addEventListener";t[n]?t[n]("DOMContentLoaded",e):window.attachEvent("onload",e)};var n=function(){var e=document.location.search;var t="";var n="";if(e!==null&&e!==""){t=e;n=e.substring(1)}return{full:t,partial:n,hasValue:function(){return this.full!==""&&this.partial!==""}}};var r=n();var i=function(t){if(t!==null&&t!==""){for(var n=0;n<e.length;n++){if(t.indexOf(e[n])!=-1)return true}}return false};var s=function(){var e=document.body.getElementsByTagName("a");var t=[];for(var n=0;n<e.length;n++){if(i(e[n].href)){t.push(e[n])}}return t};var o=function(){var e=s();for(var t=0;t<e.length;t++){if(e[t].href.indexOf("?")!=-1)e[t].href=e[t].href+"&"+r.partial;else e[t].href=e[t].href+r.full}};if(r.hasValue())t(o)})()