ActionScript 2.0 :: If The Movie Is On Frame 4 For Example, The Value Of The Variable Would Be 5?

what I am trying to accomplish is:

-declare a variable

-give that variable a value based on the frame number the movie is currently on

-then add 1 to that variable

so in effect, if the movie is on frame 4 for example, the value of the variable would be 5. The code is in a button, that controls a MC that is on the stage (it doesnt interact with the _level0 stage, just the MC its in, its for a scrolling menu)The code Im trying to use is

var scroller = _currentframe +1;
on(release){
gotoAndStop("scroller");
}