title: Simple Modal add form dialog (telerik asp.net ajax)
body: <p>I have a RadTreeView in which there is a context menu to "Add" new items to the RadTreeView.  I have all the code to do this but I simply want a modal window/popup/dialog to launch in which I can have my simple add form.  What control (Telerik or not) would be best to handle this need?  I don't want to use RadWindow since that is like an iFrame and my add form needs to be within the page that contains the RadTreeView and using the AjaxPopupExtender seems to require me to jump through all sorts of css hoops in order to not have the window flicker on load, etc.  Any simple solutions out there?</p>