/* Copyright E-Learning Developments 2010 */
/* DO NOT MOVE THIS FILE FROM THE 'js' FOLDER */
var images = new Array("home/JPL_1.jpg","home/JPL_2.jpg","home/JPL_3.jpg","home/JPL_4.jpg","home/JPL_5.jpg");

var delay = 5000;
var amount = 0.01;
var opacity = 0;
var imagea = null;
var imageb = null;
var curImg = 1;

function fade()
{
	opacity+=amount;
	if(amount>0)
	{
		if(opacity>1)
		{
			opacity = 1;
			amount*=-1;
		}
	}
	else
	{
		if(opacity<0)
		{
			opacity = 0;
			amount*=-1;
		}
	}

	imageb.style.opacity = opacity;
	imageb.style.filter = "alpha(opacity="+(opacity*100)+")";
	if(opacity!=1 && opacity!=0)
		setTimeout(fade, 1000/60);
	else
	{
		
		curImg++;
		if(curImg>=images.length)
			curImg = 0;
		if(opacity == 1) // At full opacity, change background image to next image
		{
			imagea.style.backgroundImage = "url("+images[curImg]+")";
		}
		else // At full transparency, set foreground div to next image
		{
			imageb.style.backgroundImage = "url("+images[curImg]+")";
			//alert("Changing fg to " + images[curImg]);
		}
		setTimeout(fade, delay);
	}
}

function init()
{
	imagea = document.getElementById('contentText');
	imageb = document.getElementById('fadeCover');
	setTimeout(fade,delay);
}