var timerID = 0;
var count = 0;
var bannerTags;
var curIndex = 0;
var newIndex;

function initHomeBanner() {
	//banner = document.getElementById('banner');
	bannerTags = document.getElementById('banner').getElementsByTagName('div');
	bannerTags[curIndex].className = "show";
	timerID = setInterval("updateHomeBanner()", 7000);
}

function updateHomeBanner() {
	count++;
	newIndex = count % bannerTags.length;
	
	bannerTags[newIndex].className = "show";
	bannerTags[curIndex].className = "";
	
	curIndex = newIndex;
}