var auto = true;
var currentBlock = 0;
var sheetID = "ban"; // name of serial IDs
var bannerCount = 5; // number of
var delay = 5000; // ms of delay between sheets change

function startRotation(){
	$("#ban1").css("z-index", 2);
	$("#dch-num-1").css("color", "#ffffff");
	$("#ban2").hide();
	$("#ban3").hide();
	$("#ban4").hide();
	$("#ban5").hide();
	changeBanner();
}

function move(event) {
	nextBlock = (currentBlock == bannerCount ? 1 : currentBlock+1);
	$("#ban" + currentBlock).fadeOut("slow");
	$("#ban" + nextBlock).fadeIn("slow");
	$("#dch-num-" + currentBlock).css("color", "#a0a0a0");
	$("#dch-num-" + nextBlock).css("color", "#ffffff");
	currentBlock = nextBlock;
	return false;
};

function changeBanner() {
	if (auto) {
		move();
		setTimeout("changeBanner()", delay);
	}
};

function setCBanner(n) {
	auto = false;
	$("#ban" + currentBlock).fadeOut("slow");
	$("#ban" + n).fadeIn("slow");
	$("#dch-num-" + currentBlock).css("color", "#a0a0a0");
	$("#dch-num-" + n).css("color", "#ffffff");
	currentBlock = n;
}

function dchFadeOut(a){
	$(a).hide();
}

function dchFadeIn(a){
	$(a).fadeIn("slow");
}