this script uses two layers as a mouseover button. i would recommend just using a button with the hoverimage param:
then in the maki you'll need to change a few things. you'll need to change Global layers to a global button. You will not need all of the onenterarea. and you'll have to change the Drawer.onleftbuttonup() to Drawerbutt.onleftbuttonup() or whatever you call your button. i'll atach a modified version with comments. if you have any problems just let me know and i'll see if i can clarify.