/*
Image Cross Fade Redux	Version 1.0	Last revision: 02.15.2006
steve@slayeroffice.com	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(), imgs2 = new Array(), imgs3 = new Array(), zInterval = null, current=0, current2 = 0, current3 = 0, pause=false;

var fade1 = 2000;
var fade2 = 4000;
var fade3 = 6000;

function so_init()
{
	if(!d.getElementById || !d.createElement)return;
	css = d.createElement('link');
	css.setAttribute('href','./css/slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);
	imgs = d.getElementById('slideshow').getElementsByTagName('img');
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = 'block';
	imgs[0].xOpacity = .99;
	setTimeout(so_xfade,fade1);
	////////////////////////////////////////////////
	imgs2 = d.getElementById('slideshow2').getElementsByTagName('img');
	for(i=1;i<imgs2.length;i++) imgs2[i].xOpacity = 0;
	imgs2[0].style.display = 'block';
	imgs2[0].xOpacity = .99;
	setTimeout(so_xfade2,fade2);
	////////////////////////////////////////////////
	imgs3 = d.getElementById('slideshow3').getElementsByTagName('img');
	for(i=1;i<imgs3.length;i++) imgs3[i].xOpacity = 0;
	imgs3[0].style.display = 'block';
	imgs3[0].xOpacity = .99;
	setTimeout(so_xfade3,fade3);
}
	
function so_xfade()
{
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	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;
		setTimeout(so_xfade,5000);
	}
	else
	{
		setTimeout(so_xfade,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 so_xfade2()
{
	cOpacity = imgs2[current2].xOpacity;
	nIndex2 = imgs2[current2+1]?current2+1:0;
	nOpacity = imgs2[nIndex2].xOpacity;
	cOpacity-=.05;
	nOpacity+=.05;
	imgs2[nIndex2].style.display = 'block';
	imgs2[current2].xOpacity = cOpacity;
	imgs2[nIndex2].xOpacity = nOpacity;
	setOpacity(imgs2[current2]);
	setOpacity(imgs2[nIndex2]);
	
	if(cOpacity<=0)
	{
		imgs2[current2].style.display = 'none';
		current2 = nIndex2;
		setTimeout(so_xfade2,5000);
	}
	else
	{
		setTimeout(so_xfade2,50);
	}
	
	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 so_xfade3()
{
	cOpacity = imgs3[current3].xOpacity;
	nIndex3 = imgs3[current3+1]?current3+1:0;
	nOpacity = imgs3[nIndex3].xOpacity;
	cOpacity-=.05;
	nOpacity+=.05;
	imgs3[nIndex3].style.display = 'block';
	imgs3[current3].xOpacity = cOpacity;
	imgs3[nIndex3].xOpacity = nOpacity;
	setOpacity(imgs3[current3]);
	setOpacity(imgs3[nIndex3]);
	
	if(cOpacity<=0)
	{
		imgs3[current3].style.display = 'none';
		current3 = nIndex3;
		setTimeout(so_xfade3,5000);
	}
	else
	{
		setTimeout(so_xfade3,50);
	}
	
	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) + ')';
	}
}

var baseopacity=60

function slowhigh(which2){
imgobj=which2
browserdetect=which2.filters? "ie" : typeof which2.style.MozOpacity=="string"? "mozilla" : ""
instantset(baseopacity)
highlighting=setInterval("gradualfade(imgobj)",30)
}

function slowlow(which2){
cleartimer()
instantset(baseopacity)
}

function instantset(degree){
if (browserdetect=="mozilla")
imgobj.style.MozOpacity=degree/100
else if (browserdetect=="ie")
imgobj.filters.alpha.opacity=degree
}

function cleartimer(){
if (window.highlighting) clearInterval(highlighting)
}

function gradualfade(cur2){
if (browserdetect=="mozilla" && cur2.style.MozOpacity<1)
cur2.style.MozOpacity=Math.min(parseFloat(cur2.style.MozOpacity)+0.1, 0.99)
else if (browserdetect=="ie" && cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=10
else if (window.highlighting)
clearInterval(highlighting)
}