var bannerAtual = 0;
var imgsBanner = new Array();
var timerBanner;
var interval = 4000;

window.addEventListener?window.addEventListener("load",init,false):window.attachEvent("onload",init);

function init(){
	imgsBanner = document.getElementById('banner').getElementsByTagName('img');

	imgsBanner[0].style.display = "block";
	
	if (imgsBanner.length > 1){
		timerBanner = setTimeout("dissolveBanner(bannerAtual)",interval);
	}

}

function dissolveBanner(proximo){
   if (proximo==bannerAtual){
		if (proximo+1 > imgsBanner.length-1){ proximo = 0;  }
		else { proximo++; }
   }
   $(document.getElementById('bn_' + bannerAtual)).stop('true','true').fadeOut(1000, function() {});
   $(document.getElementById('bn_' + proximo)).stop('true','true').fadeIn(1000, function(){});

   bannerAtual = proximo;
   timerBanner = setTimeout("dissolveBanner("+bannerAtual+")",interval);
}