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

// 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');
	}
}