Know any good transition tutorials? And can anyone explain this

http://www.kirupa.com/developer/flash5/slidingmenu.htm Because I don’t really understand it. And could anyone who knows of any good transition tutorials please post the URLs. Thanks! :angel:

Search !

http://www.kirupa.com/developer/mx/preloader_transition.htm
http://www.kirupa.com/developer/mx2004/transitions.htm