The alias for fail changes the context from navigator.id to window so…

… that doesn't work in a native DOM implementation.

static/browserid/provision.html

@@ -4,10 +4,6 @@
 <script type="text/javascript" src="https://browserid.org/provisioning_api.js"></script>
 <script type="text/javascript" src="/js/jquery.js"></script>
 <script type="text/javascript">
-
-  // an alias
-  var fail = navigator.id.raiseProvisioningFailure;
-
   // begin provisioning!  This both gives us indicated to browserid that we're
   // a well formed provisioning page and gives us the parameters of the provisioning
   navigator.id.beginProvisioning(function(email, cert_duration) {
@@ -17,7 +13,7 @@
       .success(function(r) {
         email = email.replace('@eyedee.me', '').toLowerCase();
         if (email != r.user) {
-          return fail('user is not authenticated as target user');
+          return navigator.id.raiseProvisioningFailure('user is not authenticated as target user');
         }
 
         // Awesome!  The user is authenticated as who we want to provision.  let's
@@ -39,13 +35,13 @@
               navigator.id.registerCertificate(r.cert);
             },
             error: function(r) {
-              fail("couldn't certify key");
+              navigator.id.raiseProvisioningFailure("couldn't certify key");
             }
           });
         });
       })
       .error(function() {
-        fail('user is not authenticated');
+        navigator.id.raiseProvisioningFailure('user is not authenticated');
       });
   });
 </script>