fix IE problem

SVN: 13536

openbis/source/java/ch/systemsx/cisd/openbis/public/index.html

@@ -18,6 +18,10 @@
     }
   }  
 </script>
+
+<!-- Required by IE (GWT 1.7) -->
+<iframe id="__gwt_historyFrame" style="width:0;height:0;border:0"></iframe>
+
 <link rel="shortcut icon" href="images/favicon.ico" />
 <link rel="icon" type="image/png" href="images/favicon.png" />
 <link rel="stylesheet" type="text/css" href="resources/css/gxt-all.css" />