// PHOTO ROTATION

var gblPhotoShufflerDivId = "image";
var gblPhotoShufflerImgId = "picture"; 
var gblImg = new Array(
    "img/image2.gif",
    "img/image3.gif",
    "img/image4.gif",
    "img/image5.gif",
    "img/image1.gif"
);
var gblPauseSeconds = 7.25;
var gblFadeSeconds = .85;
var gblRotations = 1000;
var gblDeckSize = gblImg.length;
var gblOpacity = 100;
var gblOnDeck = 0;
var gblStartImg;
var gblImageRotations = gblDeckSize * (gblRotations+1);

window.onload = photoShufflerLaunch;

function photoShufflerLaunch()
{
    var theimg = document.getElementById(gblPhotoShufflerImgId);
    gblStartImg = theimg.src;

    document.getElementById(gblPhotoShufflerDivId).style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
	setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
}

function photoShufflerFade()
{
    var theimg = document.getElementById(gblPhotoShufflerImgId);
	var fadeDelta = 100 / (30 * gblFadeSeconds);

	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;
}