newbie AS3 question where to put the code

I am making a site in using AS3, my home page is done. Now I am getting confused. I have the other sections of the site on different frames, for example the contact page is on a frame label called "contact." When the page goes there let's say I have a contactMc that has animation and stuff, how do I get that to play when the framehead moves to the contact page? Is the code from the actionscript label on frame one still being read, even tho the playhead is now on frame 10(the contact frame) I am so confused. I put some code on the contact frame and it worked, but I know the code is supposed to be all in one place right?

having code on multiple frames is completely valid unless you are building an RIA(rich internet applicaiton) u know a video interface or such.....as a matter of fact if i remember from my game programming days its impossible to execute code for frame 2 from frame1 the best you can do is a gotoAndPlay

Thank you! I felt stupid asking.