Nested modal windows

[Chris Colman]

I use nested modal windows but I was wondering about how I should set
those up in markup.
 
Eg., say I have ModalWindow 0 and Modal Window 1. Modal Window 1 can
open up on top of Modal Window 0 (nested modal)
 
Should the markup refelect this nesting or doesn't it matter?
 
Eg., should the markup be like:
 
<div wicket:id="modalWindow_0">
            <div wicket:id="modalWindow_1">
            </div>
</div>
 
Or is it ok to be:
 
<div wicket:id="modalWindow_0" />
<div wicket:id="modalWindow_1" />