only fade out success alerts

templates/download.html

@@ -34,7 +34,7 @@
             format:'YYYY-MM-DD HH:mm',
             sideBySide: true
         });
-        $(".alert").delay(4000).fadeOut(500, function() {
+        $(".alert-success").delay(4000).fadeOut(500, function() {
             $(this).alert('close');
         });
     });