/*

	Started on June 6, 2008 with code from

		Jeffrey Jordan Way, a Web Developer from Nashville, TN
			detacheddesigns.com in a post called " Why Aren't You Using jQuery: PART 3"

		http://www.detacheddesigns.com/blog/blogSpecific.aspx?BlogId=62
		http://www.detacheddesigns.com/blog/files/jQueryImageGallery.zip
		http://www.detacheddesigns.com/blog/samples/jQueryImageGallery/gallery.htm

	This revision by David Van Vickle - http://www.davidvanvickle.com
		
		Added
			Randomness
			Shuffling
			Automatic transitions
		Removed
			Thumbnails
	
*/

// change these paths for your images 
var myImages = []
for (var i = 29; i >= 0; i--){
    myImages[i] = 'images/home/'+i+'.jpg';
};

// how many times should the photo change per page load
var maxChanges = myImages.length * 6;

// shuffle images so each time page loads, the photos show in different order
var do_shuffle = false;

// use simple randomness instead of shuffling (tends to repeat images too often)
var do_randomly = false;

// number of seconds between photo changes
var seconds_between_photos = 3;

// name of DIV to load photos into
var div_name = "photos";

var changes = 0;
var timer;
var thisImg = myImages.length - 1;

//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/array/shuffle [v1.0]

shuffle = function(o){ //v1.0
	for(var j, x, i = o.length; i; j = parseInt(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
	return o;
};

// shuffling is better than random because of less potential repetition
if (do_shuffle) {
	myImages = shuffle(myImages);	
}

function nextImage () {
	
	var low = 0;
	var high = myImages.length - 1;
	var rand_no = Math.floor((high-(low - 1))*Math.random()) + low;
	
	thisImg++;
	changes++;
	if (thisImg==myImages.length) {
		thisImg = 0;
	}
	if (changes==maxChanges) {
		clearInterval(timer);
	}
	if (do_randomly) {
		thisImg = rand_no;
		return myImages[rand_no];
	} else {
		return myImages[thisImg];
	}
}

function changeImage () {
	var t = myImages[thisImg];
	var n = nextImage();
	
	if (t != n) {                           
		$("#"+div_name).addClass("loading");
		showImage(n);
	} else {                                           
		changeImage();
	}
}


function showImage(src)
{   
    var oldSrc = $("#"+div_name+" img").attr('src'); 
    $("#"+div_name).css('background-image', 'url('+oldSrc+')')
	$("#"+div_name+" img").fadeOut("normal").remove();
	var largeImage = new Image();
	$(largeImage).load(function()
                        {
							$(this).hide();
                        	$("#"+div_name).append(this).removeClass("loading");                                             
                       		$(this).fadeIn("slow");              
                        });    
	$(largeImage).attr("src", src);	                                                                               
}

function checkForLoaded () {
	if (document.getElementById(div_name) != null) {
		clearInterval(timer);
		changeImage();
		timer = setInterval(changeImage, (seconds_between_photos * 1000));
	}
}

// check every second to see if DIV exists, when it does, start photo changing timer
timer = setInterval(checkForLoaded, 500);