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

// 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': 'normal',
            'type': 'random_start',
            '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);

        var textsElement = $('div.imgCoverDiv').children();

        if (elements.length > 1) {
            $(container).css('position', 'relative').css('height', settings.containerheight).css('margin-top', '0px').addClass(settings.runningclass);
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute').hide();

            };
            for (var i = 0; i < textsElement.length; i++) {
                $(textsElement[i]).css('z-index', String(textsElement.length - i)).css('position', 'absolute').hide();
            }
            if (settings.type == "sequence") {
                setTimeout(function() {
                    $.innerfade.next(elements, textsElement, settings, 1, 0);
                }, settings.timeout);
                $(elements[0]).show();
                $(textsElement[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)); //random number between 0 and the number of images (fx. 0-8)
                var last = elements.length-1;
                if (current - 1 >= 0) {
                    last = current - 1;
                }

                var textElementToUse = current * 2; //the correct p element to use
                var lastTextElementUsed = last * 2;

                setTimeout(function() {
                    $.innerfade.next(elements, textsElement, settings, current, last, textElementToUse, lastTextElementUsed);
                }, settings.timeout);

                $(elements[last]).show();
                $(textsElement[lastTextElementUsed]).show();
                $(textsElement[lastTextElementUsed + 1]).show();


            } else {
                alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
            }
        }
        if ($('div.imgCoverDiv'))
            $('div.imgCoverDiv').css('z-index', 100);
    };

    $.innerfade.next = function(elements, textsElement, settings, current, last, textElementToUse, lastTextElementUsed) {
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);

        } else if (settings.animationtype == 'fade') {

            //fade the image element
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed, function() {
                removeFilter($(this)[0]);
            });

            //fade the text tag
            $(textsElement[lastTextElementUsed]).fadeOut(settings.speed);
            $(textsElement[textElementToUse]).fadeIn(settings.speed, function() {
                removeFilter($(textsElement)[textElementToUse]);
            });

            //fade the 'b' tag
            $(textsElement[lastTextElementUsed + 1]).fadeOut(settings.speed);
            $(textsElement[textElementToUse + 1]).fadeIn(settings.speed, function() {
                removeFilter($(textsElement)[lastTextElementUsed]);
            });

        } else
            alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
        if (settings.type == "sequence") {
            /*
            alert('current=' + current.toString() + ' last=' + last.toString());
            alert('textElementToUse=' + textElementToUse.toString() + ' lastTextElementUsed=' + lastTextElementUsed.toString());
            */

            if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1;
            } else {
                current = 0;
                last = elements.length - 1;
            }
            lastTextElementUsed = textElementToUse;
            textElementToUse = current * 2;


        } 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, textsElement, settings, current, last, textElementToUse, lastTextElementUsed);
        }), settings.timeout);
    };

})(jQuery);

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