use ===/!== instead of ==/!= in application.js (#13811)

Contributed by Adrian Wilkins.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11729 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/javascripts/application.js

 
 function showAndScrollTo(id, focus) {
   $('#'+id).show();
-  if (focus!=null) {
+  if (focus !== null) {
     $('#'+focus).focus();
   }
   $('html, body').animate({scrollTop: $('#'+id).offset().top}, 100);
 
 function showModal(id, width) {
   var el = $('#'+id).first();
-  if (el.length == 0 || el.is(':visible')) {return;}
+  if (el.length === 0 || el.is(':visible')) {return;}
   var title = el.find('h3.title').text();
   el.dialog({
     width: width,
 
   $('#ajax-indicator').bind('ajaxSend', function(event, xhr, settings) {
   
-    if ($('.ajax-loading').length == 0 && settings.contentType != 'application/octet-stream') {
+    if ($('.ajax-loading').length === 0 && settings.contentType != 'application/octet-stream') {
       $('#ajax-indicator').show();
     }
   });