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

var d2=document, imgs_apoio = new Array(), zInterval = null, current_apoio=0, pause=false;

function so_init() {
	if(!d2.getElementById || !d.createElement)return;

	// DON'T FORGET TO GRAB THIS FILE AND PLACE IT ON YOUR SERVER IN THE SAME DIRECTORY AS THE JAVASCRIPT!
	// http://slayeroffice.com/code/imageCrossFade/xfade2.css
	css = d2.createElement("link");
	css.setAttribute("href","css/base.css");
	css.setAttribute("rel","stylesheet");
	css.setAttribute("type","text/css");
	d2.getElementsByTagName("head")[0].appendChild(css);

	imgs_apoio = d2.getElementById("banner-apoio").getElementsByTagName("img");
	for(i=1;i<imgs_apoio.length;i++) imgs_apoio[i].xOpacity_apoio = 0;
	imgs_apoio[0].style.display = "block";
	imgs_apoio[0].xOpacity_apoio = .99;
	
	setTimeout(so_xfade_apoio,500);
}

function so_xfade_apoio() {
	cOpacity_apoio = imgs_apoio[current_apoio].xOpacity_apoio;
	nIndex_apoio = imgs_apoio[current_apoio+1]?current_apoio+1:0;

	nOpacity_apoio = imgs_apoio[nIndex_apoio].xOpacity_apoio;
	
	cOpacity_apoio-=.05; 
	nOpacity_apoio+=.05;
	
	imgs_apoio[nIndex_apoio].style.display = "block";
	imgs_apoio[current_apoio].xOpacity_apoio = cOpacity_apoio;
	imgs_apoio[nIndex_apoio].xOpacity_apoio = nOpacity_apoio;
	
	setOpacity(imgs_apoio[current_apoio]); 
	setOpacity(imgs_apoio[nIndex_apoio]);
	
	if(cOpacity_apoio<=0) {
		imgs_apoio[current_apoio].style.display = "none";
		current_apoio = nIndex_apoio;
		setTimeout(so_xfade_apoio,3000);
	} else {
		setTimeout(so_xfade_apoio,50);
	}
	
	function setOpacity(obj) {
		if(obj.xOpacity_apoio>.99) {
			obj.xOpacity_apoio = .99;
			return;
		}
		obj.style.opacity = obj.xOpacity_apoio;
		obj.style.MozOpacity = obj.xOpacity_apoio;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity_apoio*100) + ")";
	}
	
}