Global exception handler is not registered until the page's controller adds it.

It is bad form to register this handler on definition. This would cause problems if, for instance, this module was required by our Node code.

static/js/pad.js

@@ -401,6 +401,8 @@ var pad = {
 
   init: function()
   {
+    padutils.setupGlobalExceptionHandler();
+
     $(document).ready(function()
     {
       //start the costum js

static/js/pad_utils.js

@@ -459,8 +459,11 @@ var padutils = {
   }
 };
 
+var globalExceptionHandler = undefined;
+function setupGlobalExceptionHandler() {
   //send javascript errors to the server
-window.onerror = function test (msg, url, linenumber)
+  if (!globalExceptionHandler) {
+    globalExceptionHandler = function test (msg, url, linenumber)
     {
      var errObj = {errorInfo: JSON.stringify({msg: msg, url: url, linenumber: linenumber, userAgent: navigator.userAgent})};
      var loc = document.location;
@@ -470,6 +473,11 @@ window.onerror = function test (msg, url, linenumber)
  
      return false;
     };
+    window.onerror = globalExceptionHandler;
+  }
+}
+
+padutils.setupGlobalExceptionHandler = setupGlobalExceptionHandler;
 
 padutils.binarySearch = require('/ace2_common').binarySearch;