/*****

Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com

Please leave this notice intact. 

Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html


*****/


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

var d=document, imgs = new Array(), zInterval = 10000, pause=false;
var bnrIntervalId = 0;
var current = Math.random();
current = current * 8;
current = Math.ceil(current) - 1;


function so_init() {
	if(!d.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 = d.createElement("link");
	// css.setAttribute("href","/includes/css/xfade2.css");
	// css.setAttribute("rel","stylesheet");
	// css.setAttribute("type","text/css");
	// d.getElementsByTagName("head")[0].appendChild(css);

	imgs = d.getElementById("bannerContainer").getElementsByTagName("img");
	for(i=0;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[current].style.display = "block";
	imgs[current].xOpacity = .99;
	
	bnrIntervalId = setTimeout("so_xfade(1)",zInterval);
}

function so_xfade(val) {
	cOpacity = imgs[current].xOpacity;
	nIndex = current + val;
	if (nIndex < 0) {
		nIndex = 7;
	} else if (nIndex > 7) { 
		nIndex = 0;
	}

	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	imgs[nIndex].style.display = "block";
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs[current]); 
	setOpacity(imgs[nIndex]);
	
	if(cOpacity<=0) {
		imgs[current].style.display = "none";
		current = nIndex;
		if (pause) {
			clearInterval(bnrIntervalId);
		} else {
			bnrIntervalId = setTimeout("so_xfade(1)",zInterval);
		}
	} else {
		bnrIntervalId = setTimeout("so_xfade(" + val + ")",50);
	}
	
	function setOpacity(obj) {
		if(obj.xOpacity>.99) {
			obj.xOpacity = .99;
			return;
		}
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	}
	
}

function call_next_image(bnr_img_shift) {
	clearInterval(bnrIntervalId);
	pause = true;
	so_xfade(bnr_img_shift);
}