Disabling Buttons?

Ok so I have a website, and each section fades in and fades out. The problem is the hidden sections (alpha=0) still have their buttons active…you can click them

and I don’t use buttons, they are movieclips with actionscript in frame 1…

How would you make sure these are disabled?

What I tried was to create a variable sectionFlag:Number=1;

this would have a different number 1,2,3,4 depending on the current section

and then if (sectionFlag==4){ execute code }

however, the sob just wouldn’t work, it would execute the code anyway!