Cant duplicate action or movieclips for my scrollbar

Question

hi
i have some script to scroll my content in movieclip
i use this tutorial :
there are two movieclip : content_mc & mask_mc
and this is my script :
var rect:Rectangle;
var scrollerMinY:Number = scrollbar_mc.scroller_mc.y;
var contentMaxY:Number = content_mc.y;
var padding:Number = 40;
scrollbar_mc.scroller_mc.buttonMode = true;
scrollbar_mc.scroller_mc.addEventListener(MouseEvent.MOUSE_DOWN, dragIt);
function dragIt(e:MouseEvent):void {
rect = new Rectangle(4, 3, 0, 309);
scrollbar_mc.scroller_mc.startDrag(false, rect);
stage.addEventListener(MouseEvent.MOUSE_UP, dropIt);
scrollbar_mc.scroller_mc.addEventListener(Event.ENTER_FRAME, scrollIt);
function dropIt(e:MouseEvent):void {
scrollbar_mc.scroller_mc.stopDrag();
        scrollbar_mc.scroller_mc.removeEventListener(Event.ENTER_FRAME, scrollIt);
function scrollIt(e:Event):void {
var scrollerRange:Number = rect.height;
var contentRange:Number = content_mc.height - mask_mc.height + padding;
var percentage:Number = (scrollbar_mc.scroller_mc.y - scrollerMinY) / scrollerRange;
var targetY:Number = contentMaxY - percentage * contentRange;
content_mc.y = targetY;
everything works well ...
but now i want to use this script in another frame with another Movieclips ( content )
i set another instance name for my content movie clip for example : newcontent_mc
copy all actions , scrollbar movieclip and mask_mc in the same
and i replace content_mc with newcontent_mc in my script !!
i get no error in compiler when test it but the content not scrollable any more !!
i try to change instance name of mask_mc and scrollbar_mc and scroller_mc and change it in script too !!
but not success at all
in output i get this error when test the movie :
TypeError: Error #1010: A term is undefined and has no properties.
    at RAHAPharmOrgin_fla::ampouleproducts_49/frame1()
whats my mistake ??  what can i must do to use scrollbar for my various movieclip contents in my project ??

Answer 1

change your code to:
// put this on the first keyframe that contains content_mc
var target_mc:MovieClip=content_mc;
put this on the first keyframe that contains newcontent_mc
target_mc=newcontent_mc;
// put this on the first keyframe that contains your scroller
var rect:Rectangle;
var scrollerMinY:Number = scrollbar_mc.scroller_mc.y;
var contentMaxY:Number = content_mc.y;
var padding:Number = 40;
scrollbar_mc.scroller_mc.buttonMode = true;
scrollbar_mc.scroller_mc.addEventListener(MouseEvent.MOUSE_DOWN, dragIt);
function dragIt(e:MouseEvent):void {
rect = new Rectangle(4, 3, 0, 309);
scrollbar_mc.scroller_mc.startDrag(false, rect);
stage.addEventListener(MouseEvent.MOUSE_UP, dropIt);
scrollbar_mc.scroller_mc.addEventListener(Event.ENTER_FRAME, scrollIt);
function dropIt(e:MouseEvent):void {
scrollbar_mc.scroller_mc.stopDrag();
        scrollbar_mc.scroller_mc.removeEventListener(Event.ENTER_FRAME, scrollIt);
function scrollIt(e:Event):void {
var scrollerRange:Number = rect.height;
var contentRange:Number = content_mc.height - mask_mc.height + padding;
var percentage:Number = (scrollbar_mc.scroller_mc.y - scrollerMinY) / scrollerRange;
var targetY:Number = contentMaxY - percentage * contentRange;
target_mc.y = targetY;