Customize scroll bar wont working!

hi, i’ve got some prob here… let me story first for you to understand my situation…actually, i’m doing a customization scroll bar…and i’m very,very happy when its working…(after a lot of experiment…:elderly:…)…and then, the moment i very,very hate appear! it wont working at all in my swf project…that customize scroll bar become crazy everytime i click it…argggggg!!!:scream:… how could it be???

here the coding…and i hope someone can explain it to me (not explaining me the coding…but help me figure out why this problem occur)…oh god…my due date is tomorrow!!!:worried:


scrolling = function () {

var scrollHeight:Number = scrollTrack._height;
var contentHeight:Number = contentMain._height;
var scrollFaceHeight:Number = scrollFace._height;
var maskHeight:Number = maskedView._height;
var initPosition:Number = scrollFace._y=scrollTrack._y;
var initContentPos:Number = contentMain._y;
var finalContentPos:Number = maskHeight-contentHeight+initContentPos;
var left:Number = scrollTrack._x;
var top:Number = scrollTrack._y;
var right:Number = scrollTrack._x;
var bottom:Number = scrollTrack._height-scrollFaceHeight+scrollTrack._y;
var dy:Number = 0;
var speed:Number = 10;
var moveVal:Number = (contentHeight-maskHeight)/(scrollHeight-scrollFaceHeight);
 
scrollFace.onPress = function() {

var currPos:Number = this._y;
startDrag(this, false, left, top, right, bottom);
this.onMouseMove = function() {

dy = Math.abs(initPosition-this._y);
contentMain._y = Math.round(dy*-1*moveVal+initContentPos);

};

};
scrollFace.onMouseUp = function() {

stopDrag();
delete this.onMouseMove;

};
btnUp.onPress = function() {

this.onEnterFrame = function() {

if (contentMain._y+speed<maskedView._y) {

if (scrollFace._y<=top) {

scrollFace._y = top;

} else {

scrollFace._y -= speed/moveVal;

}
contentMain._y += speed;

} else {

scrollFace._y = top;
contentMain._y = maskedView._y;
delete this.onEnterFrame;

}

};

};
btnUp.onDragOut = function() {

delete this.onEnterFrame;

};
btnUp.onRollOut = function() {

delete this.onEnterFrame;

};
btnDown.onPress = function() {

this.onEnterFrame = function() {

if (contentMain._y-speed>finalContentPos) {

if (scrollFace._y>=bottom) {

scrollFace._y = bottom;

} else {

scrollFace._y += speed/moveVal;

}
contentMain._y -= speed;

} else {

scrollFace._y = bottom;
contentMain._y = finalContentPos;
delete this.onEnterFrame;

}

};

};
btnDown.onRelease = function() {

delete this.onEnterFrame;

};
btnDown.onDragOut = function() {

delete this.onEnterFrame;

};
 
if (contentHeight<maskHeight) {

scrollFace._visible = false;
btnUp.enabled = false;
btnDown.enabled = false;

} else {

scrollFace._visible = true;
btnUp.enabled = true;
btnDown.enabled = true;

}

};
scrolling();