Custom ScrollBar in Flash

Okay so I've probably watched and read every tutorial available on this subject, and none of them have worked for me, so I'm going to the pros(thats you guys :D) I'm trying to make a custom scroll button/ textfield setup. I have the dynamic textbox, the buttons, here's the code :

Down.on(click) = function() {
scrolltext.scroll--;};Up.on(click) = function() {
scrolltext.scroll++;};

And I'm getting the error "Target of Assignment must be a reference value"

Any suggestions and/or advice would be greatly appr开发者_StackOverflow社区eciated :)

I figured it out! I was using the wrong code. Here is what I found made it work:

function clickUp(event:MouseEvent):void {
scrolltext.scrollV -=1; } Up.addEventListener(MouseEvent.CLICK, clickUp);function clickDown(event:MouseEvent):void {
scrolltext.scrollV +=1;}  Down.addEventListener(MouseEvent.CLICK, clickDown);

Thanks everyone for pointing me in the right direction :)