// JavaScript Document
var k=0;
var n=0;

function NextImage(){
n=ImageList.length-1;
k++;
if(k>n){k=0; }

ShowImage(k);
}

function PreviousImage(){
 n=ImageList.length-1;
k--;
if(k<0){k=n;}

ShowImage(k);
}

function ShowImage(i){
document.mainimage.src=Folder+'/'+ImageList[i];
return true;
}