code: function(iframe){
          // iframe.contentWindow.document - for IE<7
          var doc = iframe.contentDocument ? iframe.contentDocument: iframe.contentWindow.document,
              response;
          
          this.log("converting iframe's innerHTML to JSON");
          this.log("innerHTML = " + doc.body.innerHTML);
                          
          try {
              response = eval("(" + doc.body.innerHTML + ")");
          } catch(err){
              response = {};
          }        
  
          return response;
      }
docs: Returns json object received by iframe from server.