var banner1 = 1;
var banner2 = 2;
var banner3 = 3;
var timerBanner;

function bannerStart() {
	timerBanner=setInterval('banner()', 4000);
}

function banner(id) {
	clearInterval(timerBanner);
	if (!id) {
		id = banner1;
	}
	banner1h = document.getElementById('banner'+banner1);
	banner2h = document.getElementById('banner'+banner2);
	banner1h.style.display = 'none';
	banner2h.style.display = 'block';
	banner1 = banner2;
	banner2 = id;
	timerBanner=setInterval('banner()', 3000);
} 

//bannerStart();