Update '12/index.html'

12/index.html

@@ -73,7 +73,7 @@
               <a href="shell.html" target="shell">shell</a>
              </p>
       </div>
-        <div id="shell_03"><iframe name="shell"></iframe></div>
+        <div id="shell_03" class="hidden"><iframe name="shell" id="iframe"></iframe></div>
         <div id="info"><div id="title"></div><div id="authors"></div>
       </div>
    
@@ -204,6 +204,9 @@
             player(document.querySelector("#week_02"));
             player(document.querySelector("#week_01"));  
             liveplayer(document.querySelector("#week_03")); 
+            document.querySelector("#iframe").addEventListener("load",function(){
+            document.querySelector("#shell_03").classList.remove("hidden");                                                 
+			});                                                               
           </script>
 
     </body>