var layers = new Array();
var curImg = 0;
var lastImg = 0;
var init = false;
var delay = 5000;
var DHTML = (document.getElementById || document.all || document.layers);

addLoadEvent(init_layers);

function init_layers() {
	if (!DHTML) return;
	for (i = 0; i < slides.length; i++) {
		layers[i] = new getObj(slides[i]);
	}
	init = true;
	rotate();
}

function getObj(name) {
	if (document.getElementById) {
		this.obj = document.getElementById(name);
		this.style = document.getElementById(name).style;
	} else if (document.all) {
		this.obj = document.all[name];
		this.style = document.all[name].style;
	} else if (document.layers) {
		this.obj = document.layers[name];
		this.style = document.layers[name];
	}
}

function changeSlide(change) {
	if (!init || !DHTML) return;
	curImg += change;
	if (curImg < 0) {
		curImg = slides.length-1;
	} else if (curImg >= slides.length) {
		curImg = 0;
	}
	layers[lastImg].style.visibility = 'hidden';
	layers[curImg].style.visibility = 'visible';
	lastImg = curImg;
}

function rotate() {
	show = setInterval("changeSlide(1)",delay)
}