Rollovers /hittest

hi i know how to do rollovers … thats easy
i have a cursor it is a green crosshair i need to to turn red once it rollsover a menu button
this is my idea so far

on (rollOver) {
if (_root.cross.hitTest(_root.menu1)) {
//then … idont know

but im not sure what to put next
help plz :slight_smile: