On MouseOver keep moving movieclip x

programming flash
1

I hope u can understand what i’m trying to do from my stupid drawing…
Anyways…so far i got it working but i have the feeling it’s not the best practice and my swf file moves like crap in all browser except Firefox.So if one of you guys could give a hand it will be great.

CODE:
function Move_left(e:MouseEvent) {
myTimer = new Timer(0.1, 1000);
myTimer.addEventListener(“timer”, timerHandlerleft);
myTimer.start();
}

function timerHandlerleft(event:TimerEvent):void {
if((box_mc.x+box_mc.width+10)<=next_btn.x)
{
Stopit(null);
}
else
{
lowerbox.x-=0.3;
pre_btn.addEventListener(MouseEvent.MOUSE_OUT, Stopit);
}
}
function Move_right(e:MouseEvent) {
myTimer = new Timer(0.1, 1000);
myTimer.addEventListener(“timer”, timerHandlerright);
myTimer.start();
}

function timerHandlerright(event:TimerEvent):void {

        if(box_mc.x&lt;=pre_btn.x+20)
        {
            lowerbox.x+=0.3;
            next_btn.addEventListener(MouseEvent.MOUSE_OUT, Stopit);
        }
        else
        {
        Stopit(null);
        }
    }

function Stopit(e:MouseEvent):void{
myTimer.stop();

    }