// JavaScript Document

var position = window.location.href.substr(window.location.href.indexOf('_')+1);
var siteroot = window.location.href.split("_");
var selectPrevious = '';
var amountOfImages = '29';

 
function previous() {
	
	position=position.replace(".php", "");
	
	if (position>=2) {
	position = position-1;
	}
	 
	window.location.href = siteroot[0] + "_" + position + ".php"
	
}

function next() {
	
	position=position.replace(".php", "");
	
	if (position<=23) {
	position = (position)*1 + 1;
	} 
	 
	window.location.href = siteroot[0] + "_" + position + ".php"
	
}
 
 
window.onload = loadPrev();

function loadPrev(){
	   

	position=position.replace(".php", "");
	
	if (position>=2) {
	selectPrevious = '<a href="#" onClick="previous();" id="previous">previous</a>';
	}	
	
	if (position<=23) {
	selectNext = '<a href="#" onClick="next();" id="next">next</a>';
	}	
	
	
}