/*
jquery.innerfade.js
(2008-02-14)
(http://medienfreunde.com)
*/

(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,
			'runningclass': null,
			'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){
			$(container).css('position','relative').addClass(settings.runningclass);
			for (var i = 0; i < elements.length; i++){
				//$(elements[i]).css('z-index', String(elements.length-i)).css('position','absolute').hide();
				$(elements[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('\'type\' is not defined properly');
			}
		}
	};

	$.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('\'animationtype\' is not defined properly');
		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('\'type\' is not defined properly');
		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');}}