var total = 0;
var loaded = 0;
var fadeSpeed = 10;
var showSpeed = 10000;
var current = 1;
var timer1 = null;
var faderNext = null;
var faderCurrent = null;

function init(total_images) {
	for(i=1;i<=999;i++) {
		var slide = document.getElementById('slide'+i);
		if (slide == null) { break; }
		var intro = document.getElementById('intro'+i);
		var readmore = document.getElementById('readmore'+i);
		slide.style.visibility = (i == 1 ? 'visible':'hidden');
		intro.style.visibility = (i == 1 ? 'visible':'hidden');
		readmore.style.visibility = (i == 1 ? 'visible':'hidden');
		total = i;
	}
	if (total_images && total_images > 0) {
		total = total_images;
		timer1 = setTimeout("play()", showSpeed);
	}
}

function imageLoaded() {
	loaded++;
	if (loaded >= total) {
		timer1 = setTimeout("play()", showSpeed);
	}
}

function fadeTo(next) {
	stop();
//	alert(next);
	
	if (next > total) { next = 1; }
	if (next <= 0) { next = total; }
	
	var nextSlide = document.getElementById('slide'+next);
	var currentSlide = document.getElementById('slide'+current);
	var nextIntro = document.getElementById('intro'+next);
	var currentIntro = document.getElementById('intro'+current);
	var nextReadmore = document.getElementById('readmore'+next);
	var currentReadmore = document.getElementById('readmore'+current);

	if (nextSlide != null) {
		faderNext = new Fadomatic(nextSlide, fadeSpeed, 0, 0, 100);
		faderNext.fadeIn();
	}
	
	if (current != next && currentSlide != null) {
		faderCurrent = new Fadomatic(currentSlide, fadeSpeed, 100, 0, 100);
		faderCurrent.fadeOut();
	}
	
	if (current != next && currentIntro != null) {
		currentIntro.style.visibility = 'hidden';
	}

	if (nextIntro != null) {
		nextIntro.style.visibility = 'visible';
	}
	
	if (current != next && currentReadmore != null) {
		currentReadmore.style.visibility = 'hidden';
	}
	
	if (nextReadmore != null) {
		nextReadmore.style.visibility = 'visible';
	}
	
	current = next;
}

function showNext() {
	fadeTo(current + 1);
}

function showPrevious() {
	fadeTo(current - 1);
}

function play() {
	if (current + 1 > total) {
		stop();
		fadeTo(1);
	} else {
		fadeTo(current + 1);
	}
	timer1 = setTimeout("play()", showSpeed);
	
	if (timer1 != null) {
		playbutton(true);
	}
}

function stop() {
	if (faderNext != null) {
		faderNext.show();
	}
	if (faderCurrent != null) {
		faderCurrent.hide();
	}

	if (timer1 != null) {
		clearTimeout(timer1);
		timer1 = null;
	}
	playbutton(false);
}

function playbutton(play) {
	var playbutton = document.getElementById("playbutton");
	var stopbutton = document.getElementById("stopbutton");
	if (playbutton != null && stopbutton != null) {
		playbutton.style.display = (play ? "none":"inline");
		stopbutton.style.display = (play ? "inline":"none");
	}	
}