var bannerDuration = 10 * 1600;
var bannerImages = new Array(
	'bannerads/shanghaitang/shanghaitang_banner.jpg',						 
	'/bannerads/Clarins/homepage_banner/clarins_home.gif');
var bannerLinks = new Array(
	'http://www.shanghaitang.com',						
	'http://ccb.clarins.com.hk/promo/suncareaug2007/SunCare2007ccbedm.htm');
var oldBanner = -1;
var currentBanner = -1;

function initBanner()
{

	if (!document.images) return;
	if (bannerImages.length > 1) {
		while (currentBanner == oldBanner)
		{
			var r = Math.random();
			currentBanner = Math.floor(r*bannerImages.length);
		}
	} else {
		currentBanner = 0;
	}
	

	oldBanner = currentBanner;
	document.images['banner'].src = bannerImages[currentBanner];
	setTimeout('initBanner()',  bannerDuration);
}

function sendBannerPage()
{
	urchinTracker(bannerImages[currentBanner]);
	location.href = bannerLinks[currentBanner];
}