/*#############################################
#
#		AJAX innerfade
#		based on the jQuery Framework
#		(c) 2009 by Lars Wissmann
#		state: 11.01.2009
#		version: 1.0.2
#	
##############################################*/


(function($) {

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

	$.innerfade = function(container, options) {
		var settings = {
			'animationtype':    'fade',
			'speed':            'slow',
			'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');
	}
}