/* =========================================================

// jquery.innerfade.js

// Datum: 2007-01-29
// Firma: Medienfreunde Hofmann & Baldes GbR
// Autor: 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/

// ========================================================= */


(function($) {

	$.fn.innerfade = function(options) {

		this.each(function() {

			var settings = {
				animationtype: 'fade',
				speed: 'normal',
				timeout: 2000,
				type: 'sequence',
				containerheight: 'auto',
				runningclass: 'innerfade'
			};

			if (options)
				$.extend(settings, options);

			var elements = $(this).children();

			if (elements.length > 1) {

				$(this).css('position', 'relative');

				$(this).css('height', settings.containerheight);
				$(this).addClass(settings.runningclass);

				for (var i = 0; i < elements.length; i++) {
					$(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute');
					$(elements[i]).hide();
				};

				if (settings.type == 'sequence') {
					setTimeout(function() {
						$.innerfade.next(elements, settings, 1, 0);
					}, settings.timeout);
					$(elements[0]).show();
				} else if (settings.type == 'random') {
					setTimeout(function() {
						do { current = Math.floor(Math.random() * (elements.length)); } while (current == 0)
						$.innerfade.next(elements, settings, current, 0);
					}, settings.timeout);
					$(elements[0]).show();
				} else {
					alert('type must either be \'sequence\' or \'random\'');
				}

			}

		});
	};


	$.innerfade = function() { }
	$.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);
		} else {
			alert('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('type must either be \'sequence\' or \'random\'');
		};
		setTimeout((function() { $.innerfade.next(elements, settings, current, last); }), settings.timeout);
	};
})(jQuery);