add history link

static/index2.html

@@ -77,7 +77,7 @@
       <form action="/step_questions/submit" method="post" id="msform">
         <div>
           
-        <a id='linker' display="none">影片連結</a>
+        <a id='linker' style="display: none;">影片連結</a>
         </div>
         <!-- fieldsets -->
         <fieldset>