How to open RadWindow in Parent Page

[mohammad farahani]

Hello dear

I Want to use RadWindow in a FormApplication atasp.net.

In my Parent form i used Radwindow to open child window

then in the child i want to open another window.

by search Telerik Website i find this code

var oManager = GetRadWindow().get_windowManager();
  var oWindow = oManager.open(..., "NewWindow");
oWindow.setSize(860, 600);
oWindow.center();

and it work well.But when i submit 2nd form in not work.

i use Window Manager in 2nd form but the new form open inside that form.

How can i response this job but Serversite code? or how i desolve this problem?