/*
	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
*/

var speed = 1; 
var showTime = 10; //in seconds

/* =================================== DONT TOUCH BELOW ===========================================*/
showTime = showTime*1000;
window.addEventListener?window.addEventListener('load',so_init,false):window.attachEvent('onload',so_init);

var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;

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

	css = d.createElement('link');
	css.setAttribute('href','css/slideshow.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 = 1;

	setTimeout(so_xfade,showTime);
}

function so_xfade()
{
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;
	nOpacity = imgs[nIndex].xOpacity;

	if(cOpacity >= 0.011) {
		cOpacity-=0.011;
	}
	else {
		cOpacity=0;	
	}
	if(nOpacity<=0.89) {
		nOpacity+=0.011;
	}
	else {
		nOpacity = 1;	
	}
	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,showTime);
	}
	else
	{
		setTimeout(so_xfade,speed);
	}

	function setOpacity(obj)
	{
			if(document.all) {
				obj.style.filter = 'alpha(opacity=' + (obj.xOpacity*100) + ')';
			}
			else { 
				obj.style.opacity = obj.xOpacity;
			}
	}
}