var iBannerCurrentIndex = -1;
var aBanners = [[],
				[],
				[],
				[]];

if (document.layers) {
	/*
	if (aBanners[0].length == 0) {
		document.layers["divBanners"].position = "absolute";
		document.layers["divBanners"].visibility = "hidden";
	}
	*/
}
else {
	if (aBanners[0].length == 0) document.all["divBanners"].style.display = "none";
}

if (aBanners[0].length > 0) setTimeout(cycleBanners, 500);

function bannerClick(iPos) {
	var id = getBannerId(iPos, iBannerCurrentIndex);
	if (id) {
		document.location = "/plugins/banners/redirect.asp?id=" + id;
	}
}

function cycleBanners() {
	// Cycle to next "col" of banners
	iBannerCurrentIndex++;
	if (iBannerCurrentIndex == aBanners[0].length) iBannerCurrentIndex = 0;

	// Update images
	var id;
	for (var i = 0; i < aBanners.length; i++) {
		id = getBannerId(i, iBannerCurrentIndex);
		if (id) {
			document.images["imgBanner" + i].src = "/plugins/banners/image.asp?id=" + id;
		}
	}

	setTimeout(cycleBanners, 5000);
}

function getBannerId(iPos, iIndex) {
	if (aBanners[iPos].length == 0) return null;
	if (iIndex >= aBanners[iPos].length) return aBanners[iPos][aBanners[iPos].length - 1];
	return aBanners[iPos][iIndex];
}