/*
	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(), zInterval = null, current = new Array(), pause=false;
var ssnum = 4;

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

	for(c=0;c<ssnum;c++) {
		imgs[c] = new Array();
		current[c] = 0;
		imgs[c] = d.getElementById('slideshow'+c).getElementsByTagName('img');
		for(i=1;i<imgs[c].length;i++) imgs[c][i].xOpacity = 0;
		imgs[c][0].style.display = 'block';
		imgs[c][0].xOpacity = .99;
		setTimeout('so_xfade('+c+')',2000);
	}
}

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

	cOpacity-=.05;
	nOpacity+=.05;

	imgs[c][nIndex].style.display = 'block';
	imgs[c][current[c]].xOpacity = cOpacity;
	imgs[c][nIndex].xOpacity = nOpacity;

	setOpacity(imgs[c][current[c]]);
	setOpacity(imgs[c][nIndex]);

	if(cOpacity<=0)
	{
		imgs[c][current[c]].style.display = 'none';
		current[c] = nIndex;
		setTimeout('so_xfade('+c+')',2000);
	}
	else
	{
		setTimeout('so_xfade('+c+')',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) + ')';
	}
}