Set limit on zoom variable

Whazzup;
Im stuck on this and need an “Action Script Hero”
to solve the prob…
Ive got this zoomable map working pretty well
but it keeps zooming out (ie. it dont stop!)
so I need to set a variable that limits the zooming out of
the map to a certain value like 200 and then pauses or
stops the movie clip.This would need to be set on
the rollover function see below.Does anybody know
a easy way of doing this!

on (rollOver) {
zoomMC.tzoomc=2;
}
on (rollOut, releaseOutside) {
zoomMC.tzoomc=0;
}

Im pulling my hair out ovr this!! Here is a link to the
fla file…

http://home.ripway.com/2004-3/80050/zoom_map.zip

Any help appreciated!!