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

// 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':            350,
			'buttonspeed':		100,
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null
        };
        if (options)
            $.extend(settings, options);
			
		$.innerfade.settings = settings;
        if (settings.children === null)
            $.innerfade.elements = $(container).children();
        else
            $.innerfade.elements = $(container).children(settings.children);
        if ($.innerfade.elements.length > 1) {
			var elements = $.innerfade.elements;
            $(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();
            };
			$(elements[0]).show();
			$.innerfade.current = 0;
			$.innerfade.last = 0;
			$('#slide_nav a.links').addClass('disabled');
			$.innerfade.play();

			$(container).mouseenter(function(){
				$.innerfade.stop();
			});
		
			$(container).mouseleave(function(){
				$.innerfade.play();
			});

			$('#slide_nav').mouseenter(function(){
				$.innerfade.stop();
			});
		
			$('#slide_nav').mouseleave(function(){
				$.innerfade.play();
			});

			$('#slide_nav a.links').click(function(event){
				if($.innerfade.hasPrev()){
					$.innerfade.changeTo($.innerfade.current-1, $.innerfade.settings.buttonspeed);
				}
				event.preventDefault();
				return false;
			});

			$('#slide_nav a.rechts').click(function(event){
				if($.innerfade.hasNext()){
					$.innerfade.changeTo($.innerfade.current+1, $.innerfade.settings.buttonspeed);
				}
				event.preventDefault();
				return false;
			});

			$('#slide_nav').css('display', 'block');
			
		}
		

    };
	
	$.innerfade.stop = function(){
		window.clearTimeout($.innerfade.timeout); 	
	};
	
	$.innerfade.play = function(){
		var elements = $.innerfade.elements;

        if ($.innerfade.settings.type == "sequence") {
			var current = $.innerfade.current;
			var next = 0; 
            if ((current + 1) < elements.length) {
                next = current + 1;
            }
        } else{
            alert('Innerfade-Type must either be \'sequence\'');
		}

        $.innerfade.timeout = setTimeout(
			function() { $.innerfade.changeTo(next, $.innerfade.settings.speed, true); }, 
			$.innerfade.settings.timeout
		);
	};

	$.innerfade.hasNext = function(){
		return $.innerfade.current < $.innerfade.elements.length-1;
	};

	$.innerfade.hasPrev = function(){
		return $.innerfade.current > 0;
	};

    $.innerfade.changeTo = function(next, speed, repeat) {

		var elements = $.innerfade.elements;
		var settings = $.innerfade.settings;


        $($.innerfade.elements[$.innerfade.last]).stop(true, true);
		$($.innerfade.elements[$.innerfade.current]).stop(true, true);

		if (settings.animationtype == 'fade') {
            $(elements[$.innerfade.current]).fadeOut(speed);
            $(elements[next]).fadeIn(speed, function() {
				removeFilter($(this)[0]);
			});
        } else
            alert('Innerfade-animationtype must either be \'fade\'');
			
		$.innerfade.last = $.innerfade.current;
		$.innerfade.current = next;

		if(!$.innerfade.hasPrev()){
			$('#slide_nav a.links').addClass('disabled');
		}else{
			$('#slide_nav a.links').removeClass('disabled');
		}

		if(!$.innerfade.hasNext()){
			$('#slide_nav a.rechts').addClass('disabled');
		}else{
			$('#slide_nav a.rechts').removeClass('disabled');
		}

		if(repeat === true){
			$.innerfade.play();
		}
    };

})(jQuery);

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