Is There Anyway To Switch Through Active Windows On Mac OS X Like On XP Or Vista?

Cmd-tab in OSX is similar to Alt-tab in winDoze.  

And F11 is similar to Windows-M, to minimize all apps and get to the desktop.

I even have Windows XP running like an application inside of OSX, thanks to VMWare Fusion.  It's actually a 'guest operating system' running inside of the host operating system OSX.  You have to have an Intel based mac to do that.

You can use cmd and the ` key (the one directly left of Z).  Press them together and it will cycle through your open windows on Firefox or Word... Whatever application you currently have open.

If you have a white Mac mouse, squeezing the side buttons will reveal all open windows (in all applications).