how to hide parent radwindow behaviours when open child radwindow in javascript and how to enable parnet radwindow behaviour when close child radwindow
You can do that by calling a JavaScript function that resides in the main page and modifies the behaviors of the parent RadWindow by using its set_behaviors() method. You will call this function when the child window is opened and when it is closed with different arguments so that different behaviors are set.
For your convenience I prepared and attached a simple project demonstrating this approach.