Showing URL link in same page of crm-Sitemap editiing.

Hello All,

I have rquirement to display page on subarea click of sitemap in same page within CRM. I have tried with following code.

 <Group Id="Test_Group">
   <SubArea Id="Test_SubArea" url="javascript:window.open('https://test,'_parent');" AvailableOffline="false">
    <Titles>
     <Title LCID="1033" Title="Test" />
    </Titles>
   </SubArea>
  </Group>

If I directly write url without javascript it opens in same page ,but outside crm. I want to show page within CRM.

Please suggest.

Thanks in advance.