Hi,

I have the script below which controls three movieclips on different layers to scroll up/down/left/right depending on the mouse position. These three layers are visible within a frame. The effect works nicely, except that there are no constraints to stop the movieclips scrolling infinitely.

How do I make it so that the moviclips edges never come into view... i.e. the scrolling stops when the edge of the background clip touches the edge of the frame?

Actionscript Code:
var verticalCenter:Number = Stage.width/2;
var horizontalCenter:Number = Stage.height/2;

function parallax (layer, speed) {
    if (mask2.hitTest(_xmouse,_ymouse,true)) {
        var distanceX = _root._xmouse-verticalCenter;
        var distanceY = _root._ymouse-horizontalCenter;
        if (_xmouse > verticalCenter) {     
            layer._x -= distanceX*speed;
        } else {
            layer._x += distanceX*-speed;        
        }
        if (_ymouse > horizontalCenter) {
            layer._y -= distanceY*speed;
        } else {
            layer._y += distanceY*-speed;
        }
    }
}

trees1.onEnterFrame = function() { parallax(this, 1/40); }
trees2.onEnterFrame = function() { parallax(this, 1/60); } 
trees3.onEnterFrame = function() { parallax(this, 1/80); }

Many thanks for any input!