title: How to show popup on top of child window
body: <p>A is Parent application and B is child application . </p>
  
  <p>B will be launched from A . when there is session timeout in application A , i need to show intimation popup . I can show the popup on top of Application A (parent window ). lets say user is using application B (Child window) then they do not know that popup got displayed in application A (parent window) . So i want to show pop on child window which is B .  </p>
  
  <p>the solution which i am expecting is  how to show popup on top of current application which can be A (parent window  ) or B (Child window) .</p>
  
  <p>Thanks in Advance </p>