(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');
	}
}