/*
	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=3000, current=0, pause=false, idTimer=0;

function item_diapo(url)
{
	clearTimeout(idTimer);
	var fichier_url = url.substring(url.lastIndexOf("/"));
	imgs = d.getElementById('diapo_images').getElementsByTagName('img');
	for(i=0; i<imgs.length; i++)
	{
		var img_src = imgs[i].src;
		var fichier_i = img_src.substring(img_src.lastIndexOf("/"));
		if (fichier_i != fichier_url)
		{
			var num_opacite = 0;
			imgs[i].xOpacity = num_opacite;
			imgs[i].style.opacity = num_opacite;
			imgs[i].style.MozOpacity = num_opacite;
			imgs[i].style.filter = 'alpha(opacity=' + (num_opacite*100) + ')';
			imgs[i].style.display = 'none';
		}
		else
		{
			current = i;
			var num_opacite = .99;
			imgs[i].xOpacity = num_opacite;
			imgs[i].style.opacity = num_opacite;
			imgs[i].style.MozOpacity = num_opacite;
			imgs[i].style.filter = 'alpha(opacity=' + (num_opacite*100) + ')';
			imgs[i].style.display = 'block';
		}
	}
	idTimer = setTimeout(so_xfade,zInterval);
}

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

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

	idTimer = setTimeout(so_xfade,zInterval);
}

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;
		idTimer = setTimeout(so_xfade,zInterval);
	}
	else
	{
		idTimer = setTimeout(so_xfade,20);
	}

	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) + ')';
	}
}