Jon,

   Even I'm referring the test_page as the Wiki page only. What I meant to say was that test_page resides in the same directory as the page which is invoking it. I followed the same way which you have specified. My web page contains a query part and 2 button below that. I have attached a reference screenshot for you. The result I'm getting is that the same page gets embedded in the test_container instead of the test_page. I have checked that using firebug as well.

You inputs would be very helpful in this issue.

Thanks!