I'm gonna go directly to the question.
I have a flash animated logo with sound on all of the pages of my website. My goal is to make a mute button which when clicked will work on cookie base or php session (?) and will mute the sound of the logo on all pages for the given period of cookie. Now I'm not sure that this is the right forum to post this question but I do hope so.
assign a variable that determines whether a sound should play or not. you can save that variable/value to a session variable or sharedobject and use it on your other pages.