AS:: Scrolling boundaries

programming flash
1

I have a movieclip that is: Width:168 and height:25.0

I’ve made some code that when you hold the mousedown it scrolls the movieclip plus or minus across X (horizontal). The only problem I have now is I need it so that when it reaches the edge of the movieclip it doesn’t scroll anymore.

Timeline script:

 
global.isMouseDown = false;
_global.scrollLeft = false;
_global.scrollRight = false;
var myListener:Object;
myListener = new Object();
myListener.onMouseDown = function() {
 _global.isMouseDown = true;
 trace("isMouseDown = true");
};
myListener.onMouseUp = function() {
 _global.isMouseDown = false;
 trace("isMouseDown = false");
}
Mouse.addListener(myListener);
 
onEnterFrame = function(){
 if (scrollRight == true){
 animF_mc._x -= 20;

 }else{ 
 if(scrollLeft == true){
 animF_mc._x += 20;

 }
 }
}

Button Script:

on (press){
 _global.scrollRight = true;

}
on (release) {
 _global.scrollRight = false;

}

Any help would be really great as I am stumped on this one.