/*****

Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com

Please leave this notice intact. 

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(), current=0;

function so_init() {
	//PRELOAD ROLLOVER IMAGES
	var i1 = new Image();
	i1.src="/image/phroll.gif";
	var i2 = new Image();
	i2.src="/image/potroll.gif";
	var i3 = new Image();
	i3.src="/image/asproll.gif";
	var i4 = new Image();
	i4.src="/image/nvroll.gif";
	var i5 = new Image();
	i5.src="/image/piedroll.gif";
	var i6 = new Image();
	i6.src="/image/sfsroll.gif";
	
	if(!d.getElementById || !d.createElement)return;

	imgs = d.getElementById("portfolioContainer").getElementsByTagName("img");
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].xOpacity = .99;
}

function so_xfade(nIndex) {
	if ( current != nIndex && imgs[current] && imgs[nIndex] ) 
	{
		cOpacity = imgs[current].xOpacity;
	
		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;
		} else {
			setTimeout("so_xfade(" + nIndex + ");",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) + ")";
	}
	
}