Write to a global variable when in specific frame

programming flash
1

Hi

This is what I need to do:

When the value of _root.mc1._currentframe is 10 I want the value of _root.mc2._currentframe to be written (sent or changed) to a variable which I can use in mc1. So I want to be able to use this variable in different clips but I do not want it to be changed until the playhead in mc1 is in frame 10. However I do want the variable to be valid even if the playhead is not in frame 10. This should be so simple. Anyone with an idea???

This is what I have in mc1:

on (press) {
   press = true;
   if (press == true) {
        _root.mc1.gotoAndPlay(myVar);
}

This is what I have in mc2:

onClipEvent (enterFrame) {
    if (_root.mc1._currentframe==10) {
//
//I have tried the following one at the time!
//
        _global.myVar;
        var myVar;
        myVar = _root.mc2._currentframe;
        _global.myVar:Number = _root.mc2._currentframe;
        set (_global.myVar, _root.mc2._currentframe);
        _global.myVar = _root.mc2._currentframe;
        }
}