/*

Roller fader - based on:

http://slayeroffice.com/code/imageCrossFade/xfade2.js

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

Please leave this notice intact. 

*/

window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

var d=document;
var imgs = new Array();
var fadein = 0;
var target = 0;
var revert = 0;

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

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

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

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

//alert("so_goto: " + target);

        target = t;
	so_xfade();
}

function so_fadein(id) {
	fadein = d.getElementById(id);

	if(!fadein || fadein.xOpacity >= 0.99)
           return;

        fadein.xOpacity = 0;
        so_xfade();
}

function so_revert() {
    target = 0;
    so_xfade();
}

function so_xfade() {
        done = 1;

        if (revert)
	    clearTimeout(revert);
        revert = 0;

//alert("so_xfade: target: " + target);

	imgs = d.getElementById("imageContainer").getElementsByTagName("img");
	for(i=0;i<imgs.length;i++)
        {
            if (i == target)
            {
//alert("so_xfade: target: " + imgs[i].xOpacity);
	        imgs[i].xOpacity += 0.05;
	        if (imgs[i].xOpacity > 0.99)
	            imgs[i].xOpacity = 0.99;
	        imgs[target].style.display = "block";
                setOpacity(imgs[i]);
            }
            else if (imgs[i].xOpacity > 0)
            {
	        imgs[i].xOpacity -= 0.05;
	        if (imgs[i].xOpacity <= 0)
                {
	            imgs[i].xOpacity = 0;
	            imgs[i].style.display = "none";
                }
                setOpacity(imgs[i]);
            }

	    if (imgs[i].xOpacity > 0 && imgs[i].xOpacity < 0.99)
	            done = 0;
	}
	
        if (fadein && fadein.xOpacity < 0.99)
	{
	    fadein.xOpacity += 0.05;
            setOpacity(fadein);
	    done = 0;
	}

	if (!done)
        {
	    setTimeout(so_xfade,50);
        }
	else
        {
            revert = setTimeout(so_revert,3000);
        }

	function setOpacity(obj) {
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	}
}