Drop down menu trobleshooting

Hi

I'm stuck with this code for a drop down menu. The error message says It's expecting a right brace before the end of the program but as far as I can tell there's already one there... Any ideas are welcome!

import flash.events.Event;

import flash.display.SimpleButton;

addEventListener (Event.ENTER_FRAME,dropmenu1);

pages.stop();

var speed:Number=.3;

function dropmenu1(e:Event) {

          if ((menu_1.mouseY<menu_1.height&&menu_1.mouseY>0) && (menu_1.mouseX<menu_1.width&&menu_1.mouseX>0)) {

          menu_1.y-=(menu_1.y) *speed;

} else {

          menu_1.y-=(55+menu_1.y) *speed;

}

function makebtn (btn:SimpleButton,frame:Number) {

          btn.addEventListener (MouseEvent.CLICK,function() {pages.gotoAndStop (frame);});

          }

makebtn (menu_1.CAT_strategy_btn,1);

makebtn (menu_1.stage_1_btn,2);

makebtn (menu_1.stage_2_btn,3);