anchor.diff:        var testing_window;
   
         var embedded_iframe = document.getElementById('embedded_iframe');
  +      var number_div = document.getElementById('number');
  +      var executing_div = document.getElementById('currently_executing');
  +      var error_div = document.getElementById('unhandled_error');
         var use_iframe = ${useIframe};
         var start = new Date();
   
  
positive.code:       function reportError(msg) {
          function handleReady() {
            if (this.readyState == this.DONE && this.status != 200) {
              // We could not report, pop up to notify if running interactively.
              alert(this.status);
            }
          }
          contactBrowserController(
  
negative.code: 
        function run(url) {
          number_of_tests++;
          number_div.innerHTML = number_of_tests;
          executing_div.innerHTML = url;
          if (use_iframe) {
            embedded_iframe.src = url;
          } else {
  