Clickjacking protection

app/app.manifest

@@ -1,6 +1,6 @@
 CACHE MANIFEST
 
-# 4
+# 5
 
 NETWORK:
 *

app/css/app.css

@@ -1,6 +1,7 @@
 /* app css stylesheet */
 
 html {
+  display: none;
   background: #dee4e9 url(../img/bg_tile.png) 0 0 repeat;
   /*background-size: 300px 468px;*/
 }

app/index.html

@@ -23,6 +23,15 @@
   <script type="text/javascript">
   (function () {
 
+    // Prevent click-jacking
+    try {
+      if (self == top) {
+        document.documentElement.style.display = 'block';
+      } else {
+        top.location = self.location;
+      }
+    } catch (e) {console.error('CJ protection', e)};
+
     window.safeConfirm = function (params, callback) {
       if (typeof params === 'string') {
         params = {message: params};