/*
	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;
var imgs = new Array();
var zInterval = null;
var current = 0;
var pause = false;
imgs[0] = new Array();
imgs[1] = new Array();
imgs[2] = new Array();
imgs[3] = new Array();
imgs[4] = new Array();

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

	css = d.createElement('link');
	css.setAttribute('href','slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);

  for (var i=1; i <= 5; i ++) {
  	imgs[i-1] = d.getElementById('slideDiv' + i).getElementsByTagName('img');
  	for(j=1;j<imgs[i-1].length;j++) imgs[i-1][j].xOpacity = 0;
  	imgs[i-1][0].style.display = 'block';
  	imgs[i-1][0].xOpacity = .99;
  }

	setTimeout(so_xfade,3000);
}


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

	cOpacity-=.03;
	nOpacity+=.03;


	for (var i=0; i < 5; i ++) {
		imgs[i][nIndex].style.display = 'block';
		imgs[i][current].xOpacity = cOpacity;
		imgs[i][nIndex].xOpacity = nOpacity;
		
		setOpacity(imgs[i][current]);
		setOpacity(imgs[i][nIndex]);
	}
	if(cOpacity<=0)
	{
		for (var i=0; i < 5; i ++) {
			imgs[i][current].style.display = 'none';
		}
		current = nIndex;
		setTimeout(so_xfade,3000);
	}
	else
	{
		setTimeout(so_xfade,50);
		//alert(cOpacity + " " + nOpacity);
	}

	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_xfade_old()
{
	for (var i=0; i < 5; i ++) {
		cOpacity[i] = imgs[i][current[i]].xOpacity;
		nIndex[i] = imgs[i][current[i]+1]?current[i]+1:0;
		nOpacity[i] = imgs[i][nIndex[i]].xOpacity;

		cOpacity[i]-=.03;
		nOpacity[i]+=.03;

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

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

		if(cOpacity[i]<=0)
		{
			imgs[i][current[i]].style.display = 'none';
			current[i] = nIndex[i];
		}
	}
	if(cOpacity[0]<=0)
	{
		setTimeout(so_xfade,3000);
	}
	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) + ')';
	}
}