docs: function getQueryVar(q) {
          var query = window.location.search.substring(1),
              vars = query.split('&'),
              answ = null;
  
          vars.forEach(function(el, i){
              var pair = el.split('=');
  
              if(pair[0] === q) {
                  answ = pair[1];
              }
          });
  
          return answ;
      }