Previous and Next Frame Labels

Can someone tell me if my as3 is correct on this? Inside my page I have a previous and back button to take the user to images. 4 images total on my page.



nextBtn.addEventListener(MouseEvent.CLICK, nextSection);
prevBtn.addEventListener(MouseEvent.CLICK, prevSection);

function nextSection(event;MouseEvent):void{

var thisLabel:String = pages.currentLabel;
var thisLabelNum:String = thisLabel.replace("sct","");
var curNumber:Number = Number(thisLabelNum);
if (curNumber < 4{

var nextNum:Number = curNumber + 1;
pages.gotoAndStop("sct"+ nextNum):

}

}

function prevSection(event:MouseEvent):void{

var thisLabel:String = pages.currentLabel;
var thisLabelNum:String = thisLabel.replace("sct","");
var curNumber;Number(thisLabelNum);

aaahhh that one snuck by me. thanks!