collapside doest appear collapsed and get collapsed in a second, a bit ugly

<asp:Panel id="pp"style="height:0px;overflow:hidden">...

ups, that was obvious, i haven't realized.

Perhaps collapsed attribute gives a little confusion.

Thanks

Unfortunately it's not obvious - it's really the "overflow:hidden" that does the trick - and unfortunately there's nothing to toolkit can do about it. By the time we're running code, you've already seen the panel render larger.

Note the collapsed attribute tells the behavior that the initial state is closed. Without that, we'd have to guess.

Well, but you can explain it in bold and red in the documentation and in the example :), with that is enough.

Another thing with that is ... could you make it softer? it opens very rude.

I am not trying to criticise, i love what you are doing, it is an excellent job, ajax will be maintainable with atlas.