(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,
			'slideshow':		  'on'
		};
		if (options)
			$.extend(settings, options);
		if (settings.children === null)
			elements = $(container).children();
		else
			elements = $(container).children(settings.children);
		if (elements.length > 1) {
			$(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
			var controls = '<div id="controls" class="cur_0">';
			for (var i = 0; i < elements.length; i++) {
				$(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();
				controls += '<div class="control">&nbsp;</div>';
			};
			var togglestate = (settings.slideshow === 'off') ? 'Play' : 'Stop';
			controls += '<p><a href="#" id="backbutton">Back</a><span>|</span><a href="#" id="nextbutton">Next</a><span>|</span><a href="#" id="toggleslideshow">'+togglestate+'</a></p></div>';
			$(container).after(controls);
			$('.control').eq(0).addClass('activecontrol')
			setTimeout(function() {
				$.innerfade.slide(elements, settings, 1, 0);
			}, settings.timeout);
			$(elements[0]).show();
		}
		
		$('#toggleslideshow').click(function() {
			var isPaused = $(this).text();
			if(isPaused == "Stop") {
				$(this).text("Play");
				settings.slideshow = 'off';
			} else {
				$(this).text("Stop");
				settings.slideshow = 'on';
				container_class = $("#controls").attr("class");
				container_item_string = container_class.split("_");
				container_item_id = container_item_string.pop();
				cur_id = parseFloat(container_item_id);
				if ((cur_id + 1) < elements.length) {
					cur_id = cur_id + 1;
					last_id = cur_id - 1;
				} else {
					cur_id = 0;
					last_id = elements.length - 1;
				}
				setTimeout(function() {
					$.innerfade.slide(elements, settings, cur_id, last_id);
				}, settings.timeout);
			}
			return false;
		});
		
		$('#nextbutton').click(function() {
			settings.slideshow = 'off';
			$('#toggleslideshow').text("Play");
			container_class = $("#controls").attr("class");
			container_item_string = container_class.split("_");
			container_item_id = container_item_string.pop();
			cur_id = parseFloat(container_item_id);
			if ((cur_id + 1) < elements.length) {
				var next_id = cur_id + 1;
			} else {
				var next_id = 0;				
			}
			$.innerfade.next(elements, settings, next_id, cur_id);
			return false;
		});
		
		$('#backbutton').click(function() {
			settings.slideshow = 'off';
			$('#toggleslideshow').text("Play");
			container_class = $("#controls").attr("class");
			container_item_string = container_class.split("_");
			container_item_id = container_item_string.pop();
			cur_id = parseFloat(container_item_id);
			if (cur_id > 0) {
				var next_id = cur_id - 1;
			} else {
				var next_id = elements.length - 1;	
			}
			$.innerfade.next(elements, settings, next_id, cur_id);
			return false;
		});
		
	};
	
	$.innerfade.next = function(elements, settings, current, last) {
		$(elements[last]).fadeOut('fast');
		$(elements[current]).fadeIn('fast', function() {
			removeFilter($(this)[0]);
			$('#controls').removeClass().addClass('cur_'+current);
			$('.control').removeClass('activecontrol').eq(current).addClass('activecontrol');
		});
	};

	 
	$.innerfade.slide = function(elements, settings, current, last) {
		var curitem;
		if (settings.slideshow == 'on') {
			$(elements[last]).fadeOut(settings.speed);
			$(elements[current]).fadeIn(settings.speed, function() {
				removeFilter($(this)[0]);
				curitem = last + 1;
				$('#controls').removeClass().addClass('cur_'+last);
				$('.control').removeClass('activecontrol').eq(last).addClass('activecontrol');
			});
			if ((current + 1) < elements.length) {
				current = current + 1;
				last = current - 1;
			} else {
				current = 0;
				last = elements.length - 1;
			}
			setTimeout((function() {
				$.innerfade.slide(elements, settings, current, last);
			}), settings.timeout);
		}
	};

})(jQuery);

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