var imgFolder = "images/";
var imgType = ".jpg";
var ambientNum = 6;
var wheelzNum = 6;
var ultimateNum = 5;
var monumentNum = 2;

var i = 1;

function prev(appname){
	i--;
	if (i < 1) {
		i = eval(appname + "Num");
	}
	document.getElementById(appname + "shot").src = imgFolder + appname + i + imgType;
}

function next(appname){
	i++;
	if (i > eval(appname + "Num")) {
		i = 1;
	}
	document.getElementById(appname + "shot").src = imgFolder + appname + i + imgType;
}