Сделайте с target_mc типа кнопки

Код AS1/AS2:
_parent.bob.attachMovie("cursor_id","cursor_mc",this.getNextHighestDepth(),{_x:_xmouse, _y:_ymouse, _visible:false});
target_mc.onRollOver = function() {
Mouse.hide();
cursor_mc._visible = true;
};
target_mc.onRollOut = function() {
Mouse.show();
cursor_mc._visible = false;
};
cursor_mc.onMouseMove = function() {
this._x = _xmouse;
this._y = _ymouse;
updateAfterEvent();
};