How is this done?

today i opened up yahoo see an add for the new cat woman movie in the upercorner of the page and its flash and when you click it … it opens with
transparency on top of the html page … how is this type of thing done?
check it out www.yahoo.com
it moves in top right corner.

css

i did not see any effect…
you mean like ads on wwwrediff.com

same, i didnt see it
i guess it is flash transparency + javascript floating image in html

It’s pretty easy using GoLive. You create your Flash Movie, making sure that it is transparent. Then in GoLive, add a DIV, and record the fly-in movement you want. Add the Flash file into GoLive and you are good to go.