/*****
IN
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(), zInterval = null, current=0, pause=false, firstime = true;
function so_init() {
	if(!d.getElementById || !d.createElement)return;
	
	imgs = d.getElementById("imageContainer").getElementsByTagName("img");
	for(i=0;i<imgs.length;i++) imgs[i].xOpacity = 0;
	
	current = aleatorio(0,imgs.length-1);
	
	imgs[current].style.display = "block";
	imgs[current].xOpacity = .01;
	
	setTimeout(so_xfade,10);
}

function so_xfade() {
	if (firstime)
	{
		cOpacity = imgs[current].xOpacity;
		cOpacity+=.05; 
		imgs[current].xOpacity = cOpacity;
		setOpacity(imgs[current]);

		if(cOpacity>=1) {
		   firstime = false; 	   
		   setTimeout(so_xfade,12000);
		   d.getElementById("mainHeader").style.backgroundImage="none";
		}
		else {
			setTimeout(so_xfade,50);	
		}		
	}
	else{

		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) {
			//alert("1");
			imgs[current].style.display = "none";
			current = nIndex;
			setTimeout(so_xfade,12000);
		} else {
			setTimeout(so_xfade,50);
			//alert("2");
		}
	}
	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 aleatorio(inferior,superior){
numPosibilidades = superior - inferior
aleat = Math.random() * numPosibilidades
aleat = Math.round(aleat)
return parseInt(inferior) + aleat
}