ActionScript 2.0 :: Image Galery Syntax "there Is A "}" Unexpected On Line 15"?

I'm making a simple image galery with AS2.0 but it doesn't work.. Here is the script

ActionScript Code:
stop();
btn1.addEventListener(MouseEvent.CLICK,precedent);
btn2.addEventListener(MouseEvent.CLICK,suivant);[code]....

When I launch the preview, flash tells me that there is two problems:

1- he is expecting a ")" or a "," on line 7

2- there is a "}" unexpected on line 15

Then I looked to my script again and again and I can't see where is the mistake..