var img_n = 1;

function disp(){
document.images[1].src="images\/"+galname+"-"+img_n+".jpg";
}

function show(numberi){
document.images[1].src="images\/"+galname+"-"+numberi+".jpg";
}

function up(){
if (img_n < max_img){
img_n = img_n+1;
document.images[2].src="images\/navbar.gif";
disp();
}
if (img_n == max_img){
document.images[2].src="images\/navbarl.gif";
}
}

function down(){
if (img_n > 1){
img_n = img_n-1;
document.images[2].src="images\/navbar.gif";
disp();
}
if (img_n == 1){
document.images[2].src="images\/navbarr.gif";
}
}