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;
var counter = 0;
var img_names = new Array("http://www.printmaking-materials.com/images/large/1301.jpg", "http://www.printmaking-materials.com/images/large/4054.jpg", "http://www.printmaking-materials.com/images/large/6436.jpg", "http://www.printmaking-materials.com/images/graphics/e24_slide.gif");
img_names.sort(function() {return 0.5 - Math.random()});
// book, pencils, tank, press

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);

	if(!d.getElementById('rotator'))	return;
	imgs = d.getElementById('rotator').getElementsByTagName('img');
	imgs[1].src = img_names[1];
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = 'block';
	imgs[0].xOpacity = .99;

	setTimeout(so_xfade,3000);
}

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)
	{
		counter++;
		imgs[current].style.display = 'none';
		current = nIndex;
		var next_next = (current+1) % 4;
		if(counter < 4)
		{
			imgs[next_next].src = img_names[next_next];
		}
		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) + ')';
	}
}