Implement user authorization

assets/js/common.js

@@ -0,0 +1,23 @@
+/**
+ * Shows a message box with given the title and message.
+ * 
+ * @param {} title
+ * @param {} message
+ */
+var message = function(title, message, icon) {
+    Ext.Msg.show({
+        title: title,
+        msg: message,
+        minWidth: 200,
+        modal: true,
+        icon: Ext.Msg.ERROR,
+        buttons: Ext.Msg.OK
+    });
+}
+
+/**
+ * Initialize tooltips.
+ */
+$(document).ready(function() {
+    Ext.QuickTips.init();
+});