/*
	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, imgs = new Array(), zInterval = null, current=0, pause=false;

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

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

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

    setTimeout(so_xfade, 4000);
}

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)
    {
            imgs[current].style.display = 'none';
            current = nIndex;
            setTimeout(so_xfade, 4000);
    }
    else
    {
            setTimeout(so_xfade, 200);
    }

    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) + ')';
    }
}