SmartNavigation without ASP.NET????

Tip of the day,
Wanna reproduce smartnavigation behaviour for your web pages?????
Was playing around with the feature provided by ASP.NET and it performs somewhat like this:

   <script>
       function TrialSaving()
       {
           StorageSpace.document.write(document.body.innerHTML);
           StorageSpace.document.forms[0].submit();
           StorageSpace.document.body.innerHTML="";
           setTimeout("tryMe()",300);
           return false;
       }
       function tryMe()
       {
           if(StorageSpace.document.body.innerHTML=="")
               setTimeout("tryMe()",300);
           else
               document.body.innerHTML=StorageSpace.document.body.innerHTML;
       }
   </script>

   <iframe name='StorageSpace' width=100%></iframe>

Call function TrialSaving before submiting your form. And, voila, the page does not seem to refresh. U can go about adding hidden fields to indicate last focussed controls etc.  
Of course this is a miniature version, can be modified to perform better and add more functionality.