Theres any variable to know the stage size?

Hello.
I’d like to give a limit of drag something based on the area of the browser and not on the area of my swf stage. How can i do that?

I’m doing a flash and exporting it as 100% x 100% with no scale. The area with the menus let’s say its on the 760x420 stage area and everything else, but then i have a background that goes out of the util area. i have something that i want to be dragged to the limit of the browser of the person that are watching the site.

How can i get that variable? browserheight or something like that…

thanks