var initialDelay = 10000; // ms
var changeDelay  = 8000;  // ms
var fadeDelay    = 10;    // ms
var imgDelay     = 500;   // ms
var curImage;

// Image Array
var banner_img = new Array();

banner_img[0] = "/images/banners/bwt_banner1.jpg";
banner_img[1] = "/images/banners/bwt_banner2.jpg";
banner_img[2] = "/images/banners/bwt_banner3.jpg";
banner_img[3] = "/images/banners/bwt_banner6.jpg";
banner_img[4] = "/images/banners/bwt_banner12.jpg";
banner_img[5] = "/images/banners/bwt_banner13.jpg";
banner_img[6] = "/images/banners/bwt_banner14.jpg";

function changeImage()
{
    curImage++;
    if (curImage >= banner_img.length)
    {
        curImage = 0;
    }
	fadeOutImage(100);
}

function fadeOutImage(val)
{
	var bannerImg = document.getElementById("main_logo");

	val--;
	if (val > 0 && val < 100)
	{
		bannerImg.style.opacity = val / 100;
		bannerImg.style.filter  = "alpha(opacity="+val+")";
		setTimeout(function(){fadeOutImage(val);}, fadeDelay);
	}
	else
	{
		bannerImg.src = banner_img[curImage];
		setTimeout(function(){fadeInImage(0);}, imgDelay);
	}
}

function fadeInImage(val)
{
	var bannerImg = document.getElementById("main_logo");

	val++;
	if (val > 0 && val < 100)
	{
		bannerImg.style.opacity = val / 100;
		bannerImg.style.filter  = "alpha(opacity="+val+")";
		setTimeout(function(){fadeInImage(val);}, fadeDelay);
	}
	else
	{
		setTimeout(function(){changeImage();}, changeDelay);
	}
}

function initFader()
{
	curImage = 0;
	setTimeout(function(){changeImage();}, initialDelay);
}