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

// 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/
// extended for use with controls by A. Shubov <axlwork at gmail dot com> at Apr 02, 2010

 *
 *  <ul id="news">
 *      <li>content 1</li>
 *      <li>content 2</li>
 *      <li>content 3</li>
 *  </ul>
 *  <div>
 *      <a href="#" class="control">ctrl</a>
 *      <a href="#" class="control">ctrl</a>
 *      <a href="#" class="control">ctrl</a>
 *  </div>
 *
 *  $('#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),
 *    controls: optional selector (.control) of control elements to select the "current" element. Controls count should match with elements count (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':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
            'controls':         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) {
            var controls = false;
            if (settings.controls !== null) {
                var controls = $(settings.controls);
                if (controls.length > 0) {
                    controls.each(function(idx) {
                        var control = $(this);
                        control.click(function() {
                            clearTimeout(settings.timedOut);
                            $.innerfade.next(elements, settings, idx);
                            control.blur();
                            return false;
                        });
                    });
                }
            }
            $(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") {
                settings.timedOut = setTimeout(function() {
                    $.innerfade.next(elements, settings, 1);
                }, settings.timeout);
                $(elements[0]).show();
            } else if (settings.type == "random") {
                var last = Math.floor ( Math.random() * ( elements.length ) );
                settings.timedOut = setTimeout(function() {
                    do {
                        current = Math.floor ( Math.random( ) * ( elements.length ) );
                    } while (last == current );
                    $.innerfade.next(elements, settings, current);
                }, settings.timeout);
                $(elements[last]).show();
            } else if ( settings.type == 'random_start' ) {
                settings.type = 'sequence';
                var current = Math.floor ( Math.random () * ( elements.length ) );
                settings.timedOut = setTimeout(function(){
                    $.innerfade.next(elements, settings, (current + 1) % elements.length);
                }, settings.timeout);
                $(elements[current]).show();
            } else {
                alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
            }
        }
    };

    $.innerfade.next = function(elements, settings, current) {
        var controls = $(settings.controls);
        if (controls.length > 0) {
            controls.removeClass('active');
            $(controls.get(current)).addClass('active');
        }
        if (settings.animationtype == 'slide') {
            $(elements).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements).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;
            } else {
                current = 0;
            }
        } 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\'');
        }
        settings.timedOut = setTimeout((function() {
            $.innerfade.next(elements, settings, current);
        }), settings.timeout);
    };

})(jQuery);

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