var gblPhotoShufflerDivId = "theme_visual";
var gblPhotoShufflerImgId = "theme_img"; 

var gblPauseSeconds = 7;
var gblRotations = 100;

var gblDeckSize = gblImg.length;
var gblOpacity = 0;
var gblOnDeck = 0;
var gblStartImg;
var gblImageRotations = gblDeckSize * (gblRotations+1);

function photoShufflerLaunch() {
	var theimg = document.getElementById(gblPhotoShufflerImgId);
	gblStartImg = theimg.src;
	document.getElementById(gblPhotoShufflerDivId).style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
	photoShufflerFade();
}

function photoShufflerFade() {
	var theimg = document.getElementById(gblPhotoShufflerImgId);
	var fadeDelta = 2;
	if (gblOpacity < 2*fadeDelta ) {
		gblOpacity = 100;
		if (gblImageRotations < 1) return;
		photoShufflerShuffle();
		setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
	} else {
		gblOpacity -= fadeDelta;
		setOpacity(theimg,gblOpacity);
		setTimeout("photoShufflerFade()",30);
	}
}

function photoShufflerShuffle() {
	var thediv = document.getElementById(gblPhotoShufflerDivId);
	var theimg = document.getElementById(gblPhotoShufflerImgId);

	theimg.src = gblImg[gblOnDeck];
	setOpacity(theimg,100);
	gblOnDeck = ++gblOnDeck % gblDeckSize;
	if (--gblImageRotations < 1) {
		gblImg[gblOnDeck] = gblStartImg;
	}
	thediv.style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
}

function setOpacity(obj, opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	obj.style.filter = "alpha(opacity:"+opacity+")";
	obj.style.KHTMLOpacity = opacity/100;
	obj.style.MozOpacity = opacity/100;
	obj.style.opacity = opacity/100;
}