changed content div to new style

Author: agcolom

demos/pages/startpage.html

@@ -41,11 +41,11 @@
     <h1>same page transitions</h1>
   </div><!-- /header 1 -->
 
-  <div data-role="content">
+  <div role="main" class="ui-content">
      <a data-role="button" href="samepagetransition.html">Go to page 2</a>
     </div><!-- /content 1 -->
 
 </div><!-- /page 1 -->
 
 </body>
-</html>
+</html>