var NEXT = true;
var PREV = false;

function next(){
	var current = getCurrentPageNum(NEXT);
	var page = prefix+current+suffix;
	goTo(page);
}

function prev(){
	var current = getCurrentPageNum(PREV);
	var page = prefix+current+suffix;
	goTo(page);
}

function goTo(whichPage){
	document.location.href = whichPage;
}

function getCurrentPageNum(next){
	var current = document.location.href;
	var page = current.substring(current.lastIndexOf("/")+1, current.length);
	var num = page.substring(page.indexOf(prefix)+prefix.length, page.indexOf(suffix)+1);
	if(isNaN(num)){
		num = pageMin;
	} else {
		if(next){
			num++;
		} else {
			num--;
		}
		if(num < pageMin){
			num = pageMin;
		} else if (num > pageMax) {
			num = pageMax;
		}
	}
	return(num);
}