Updates CFInstall.js to:...

chrome_frame/test/data/chrome_frame_tester_helpers.js

 //
 // This script provides some mechanics for testing ChromeFrame
 //
 function onSuccess(name, id) {
   onFinished(name, id, "OK");
 }
 
 function onFailure(name, id, status) {
   onFinished(name, id, status);
 }
 
+function byId(id) {
+  return document.getElementById(id);
+}
+
 function getXHRObject(){
   var XMLHTTP_PROGIDS = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP',
                          'Msxml2.XMLHTTP.4.0'];
   var http = null;
   try {
     http = new XMLHttpRequest();
   } catch(e) {
   }
 
   if (http)
@@ skipping 62 matching lines @@
 
   // set a cookie to report the results...
   var cookie = name + "." + id + ".status=" + result + "; path=/";
   document.cookie = cookie;
 
   // ...and POST the status back to the server
   postResult(name, result);
 }
 
 function appendStatus(message) {
-  var statusPanel = document.getElementById("statusPanel");
+  var statusPanel = byId("statusPanel");
   if (statusPanel) {
     statusPanel.innerHTML += '<BR>' + message;
   }
 }
 
 function readCookie(name) {
   var cookie_name = name + "=";
   var ca = document.cookie.split(';');
 
   for(var i = 0 ; i < ca.length ; i++) {
@@ skipping 41 matching lines @@
 }
 
 function TestIfRunningInChrome() {
   var is_chrome = isRunningInChrome();
   if (!is_chrome) {
     onFailure("ChromeFrameWindowOpen", "Window Open failed :-(",
               "User agent = " + navigator.userAgent.toLowerCase());
   }
   return is_chrome;
 }