Do not try to submit if we already know the name is invalid

public/js/vroom.js

@@ -236,6 +236,11 @@ function initIndex(){
   // Submit the main form to create a room
   $('#createRoom').submit(function(e){
     e.preventDefault();
+    // Do not submit if we know the name is invalid
+    if (!$('#roomName').val().match(/^[\w\-]{0,49}$/)){
+      $('#roomName').notify('ERROR_NAME_INVALID', 'error');
+    }
+    else{
       $.ajax({
         url: rootUrl + 'create',
         type: 'POST',
@@ -260,6 +265,7 @@ function initIndex(){
           $.notify(locale.ERROR_OCCURRED, 'error');
         }
       });
+    }
   });
 
   // Handle join confirmation