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

// 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' or 'random_except_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)
 *	  loadfunction: optional image loader
 *  }); 
 *

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


(function($) {

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

    $.innerfade = function(container, options) {
        var settings = {
            'animationtype': 'fade',
            'speed': 'normal',
            'type': 'random',
            'timeout': 2000,
            'containerheight': '300px',
            'runningclass': 'innerfade',
            'children': null,
            'loadimage': function(el) {}
        };

        if (options)
            $.extend(settings, options);

        if (settings.children === null)
            var elements = $(container).children();
        else
            var elements = $(container).children(settings.children);
            
        var timeoutFunction = function() {
                    $.innerfade.next(elements, settings, 1, 0) };
            
        if (elements.length > 1) {
            //$(container).css('position', 'absolute').css('height', settings.containerheight).addClass(settings.runningclass);
            //$(container).css('height', settings.containerheight).addClass(settings.runningclass);
            $(container).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();
            };
            
            var elementToShow = elements[0];

            if (settings.type == "sequence") {
                timeoutFunction = function() {
                    $.innerfade.next(elements, settings, 1, 0);
                };

                elementToShow = elements[0];
            }
            else if (settings.type == "random_except_start") {
                settings.type = 'random';

                timeoutFunction = function() {
                    $.innerfade.next(elements, settings, 1, 0);
                    };
                elementToShow = elements[0];
            }
            else if (settings.type == "random") {
                var last = Math.floor(Math.random() * (elements.length));
                timeoutFunction = function () {
                    do {
                        current = Math.floor(Math.random() * (elements.length));
                    } while (last == current);
                    $.innerfade.next(elements, settings, current, last);
                };
                elementToShow = elements[last];
            } else if (settings.type == 'random_start') {
                settings.type = 'sequence';
                var current = Math.floor(Math.random() * (elements.length));
                timeoutFunction = function() {
                    $.innerfade.next(elements, settings, (current + 1) % elements.length, current);
                };
                elementToShow = elements[current];
            } else {
                alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
            }
            
            settings.loadimage(elementToShow);
            $(elementToShow).show();
            setTimeout(timeoutFunction, settings.timeout);
        }
    };

    $.innerfade.next = function(elements, settings, current, last) {

        settings.loadimage(elements[current]);

        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);
    };

    // Lazy load of images

    $.fn.loadimages = function() {
        return this.each(function() {
            $.loadimages(this);
        });
    };

    function cb() {
    }

    $.loadimages = function(container) {
        var elements = $(container).children();
        if (elements.length > 1) {
            elements.each(function(index, el) {

                if (index > 0) {
                    var img = new Image();
                    $(img).load(cb);
                    $(img).attr('src', $(this).attr('src'));
                    //$(el).append($(img));

                    $(this).css('background-image', "url('" + $(this).attr("src") + "')");
                }
            });
        }
    };

})(jQuery);

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