/* jquery.innerfade.js =========================================================
// Datum:	2008-02-14
// Firma:	Medienfreunde Hofmann & Baldes GbR
// Author:	Torsten Baldes
// Mail:	t.baldes@medienfreunde.com
// Web:		http://medienfreunde.com
// based on the work of Matt Oakes	http://portfolio.gizone.co.uk/applications/slideshow/
// and Ralf S. Engelschall		http://trainofthoughts.org/
 *
 *	<ul id="news"> 
 *		<li>content 1</li>
 *		<li>content 2</li>
 *		<li>content 3</li>
 *	</ul>
 *
 * $('#news').innerfade({
 *	animationtype:	Type of animation 'fade' or 'slide' (Default: 'fade'),
 *	speed:	Fading-/Sliding-Speed in milliseconds or keywords (slow, normal or fast) (Default: 'normal'),
 *	timeout:	Time between the fades in milliseconds (Default: '2000'),
 *	type:		Type of slideshow: 'sequence', 'random' or 'random_start' (Default: 'sequence'),
 * 	containerheight:Height of the containing element in any css-height-value (Default: 'auto'),
 *	runningclass:	CSS-Class which the container get’s applied (Default: 'innerfade'),
 *	children:	optional children selector (Default: null)
 *	});
 *
// ========================================================= */


(function($){
	$.fn.innerfade = function(options){
		return this.each(function(){
			$.innerfade(this, options);
		});
	};
	$.innerfade = function(container, options){
		var settings = {
			'animationtype':'fade',
			'speed':	'normal',
			'type':		'sequence',
			'timeout':	2000,
			'containerheight':'auto',
			'runningclass':	'innerfade',
			'children':	null
		};
		if (options)
			$.extend(settings, options);
		if (settings.children === null)
			var elements = $(container).children();
		else
			var elements = $(container).children(settings.children);
		if (elements.length > 1){
			$(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
		for (var i = 0; i < elements.length; i++){
		$(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();
		};
		if (settings.type == "sequence"){
			setTimeout(function(){
				$.innerfade.next(elements, settings, 1, 0);
			}, settings.timeout);
				$(elements[0]).show();
			}else if(settings.type == "random"){
				var last = Math.floor ( Math.random () * ( elements.length ) );
				setTimeout(function() {
					do {
					current = Math.floor ( Math.random ( ) * ( elements.length ) );
					} while (last == current );
					$.innerfade.next(elements, settings, current, last);
				}, settings.timeout);
				$(elements[last]).show();
			}else if( settings.type == 'random_start' ){
				settings.type = 'sequence';
				var current = Math.floor ( Math.random () * ( elements.length ) );
				setTimeout(function(){
			$.innerfade.next(elements, settings, (current + 1) %  elements.length, current);
				}, settings.timeout);
				$(elements[current]).show();
			}else{
			alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
			}
		}
	};
	$.innerfade.next = function(elements, settings, current, last){
		if (settings.animationtype == 'slide'){
			$(elements[last]).slideUp(settings.speed);
			$(elements[current]).slideDown(settings.speed);
		}else if(settings.animationtype == 'fade') {
			$(elements[last]).fadeOut(settings.speed);
			$(elements[current]).fadeIn(settings.speed, function(){
				removeFilter($(this)[0]);
			});
		}else
		alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
		if(settings.type == "sequence"){
			if((current + 1) < elements.length){
				current = current + 1;
				last = current - 1;
			}else{
				current = 0;
				last = elements.length - 1;
			}
		}else if(settings.type == "random"){
			last = current;
			while (current == last)
			current = Math.floor(Math.random() * elements.length);
		}else
		alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
		setTimeout((function() {
			$.innerfade.next(elements, settings, current, last);
		}), settings.timeout);
	};
})(jQuery);
// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
	if(element.style.removeAttribute){
		element.style.removeAttribute('filter');
	}
}


// * innerfade SETTING
// * animationtype: 'fade' or 'slide' (Default: 'fade'),
// * speed: milliseconds or keywords (slow, normal or fast) (Default: 'normal'),
// * timeout:  milliseconds (Default: '2000'),
// * type: 'sequence', 'random' or 'random_start' (Default: 'sequence'),
// * containerheight: any css-height-value (Default: 'auto'),
// *

$(document).ready(function(){
	$('#news').innerfade({
		animationtype:	'slide',
		speed:		'slow',
		timeout:	2000,
		type:		'random',
		containerheight:'1em'
	});
	$('ul#portfolio').innerfade({
		speed:		750,
		timeout:	4500,
		type:		'sequence',
		containerheight:'220px'
	});
	$('.fade').innerfade({
		speed:		1000,
		timeout:	6000,
		type:		'random_start',
		containerheight:'1.5em'
	});
	$('#homepage').innerfade({
		speed:		8000,
		timeout:	10000,
		type:		'sequence',
		containerheight:'180px'
	});
});