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

// 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($)
{
	var slideNumberLabel;
	var settings;
	var elements;
	var current;
	var last;
	var timer;

	$.fn.innerfade = function(options)
	{
		return this.each(function()
		{
			$.innerfade(this, options);
		});
	};

	$.innerfade = function(container, options)
	{
		settings = {
			'animationtype': 'fade',
			'speed': 'normal',
			'type': 'sequence',
			'timeout': 2000,
			'containerheight': 'auto',
			'runningclass': 'innerfade',
			'children': null
		};
		if (options)
			$.extend(settings, options);
		if (settings.children === null)
			elements = $(container).children();
		else
			elements = $(container).children(settings.children);
		slideNumberLabel = $(container).parent().find('span.currentSlideNumber').eq(0);

		current = 0;
		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")
			{
				last = elements.length - 1;

				timer = setTimeout(function()
				{
					$.next();
				}, settings.timeout);

				$(elements[0]).show();
			}
			else if (settings.type == "random")
			{
				last = Math.floor(Math.random() * (elements.length));
				current = Math.floor(Math.random() * (elements.length));
				$(elements[last]).show();
			}
			else
			{
				alert('Innerfade-Type must either be \'sequence\', \'random\'');
			}
		}

		if (slideNumberLabel && elements.length > 0)
		{
			$(slideNumberLabel).html('' + (current + 1) + ' of ' + elements.length);
		}
	};

	$.next = function()
	{
		clearTimeout(timer);

		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\'');

		timer = setTimeout(function()
		{
			$.next();
		}, settings.timeout);

		$.changeSlide();
	};

	$.previous = function()
	{
		if (settings.type == "sequence")
		{
			if ((current - 1) >= 0)
			{
				current = current - 1;
				last = current + 1;
			} else
			{
				current = elements.length - 1;
				last = 0;
			}
		}
		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\'');

		$.changeSlide();
	}

	$.changeSlide = function()
	{
		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 (slideNumberLabel)
		{
			$(slideNumberLabel).html('' + (current + 1) + ' of ' + elements.length);
		}
	}

})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
	if(element.style.removeAttribute){
		element.style.removeAttribute('filter');
	}
}