/*
	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

	Rrewritten as OOP javascript by Barry Wood @ www.otheroom.com
	Last revision: 04.04.2009
*/

xfade = function(div_name, css_file, interval)
{
	var d = document;
	var imgs = new Array();
	var current = 0;
	var pause = false;
	var thisobj = this;

	setOpacity = function(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) + ')';
	}

	this.so_xfade = function()
	{
		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(function(){thisobj.so_xfade();},interval);
		}
		else
		{
			setTimeout(function(){thisobj.so_xfade();},50);
		}
	}

	this.so_init = function()
	{
		if(!d.getElementById || !d.createElement) return;
	
		css = d.createElement('link');
		css.setAttribute('href',css_file);
		css.setAttribute('rel','stylesheet');
		css.setAttribute('type','text/css');
		d.getElementsByTagName('head')[0].appendChild(css);
	
		imgs = d.getElementById(div_name).getElementsByTagName('img');
		for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
		imgs[0].style.display = 'block';
		imgs[0].xOpacity = .99;

		setTimeout(function(){thisobj.so_xfade();},interval);
	}

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

}