/* =========================================================
// jquery.innerfade.js
// Datum: 2007-01-29
// Firma: Medienfreunde Hofmann & Baldes GbR
// Autor: 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/
// ========================================================= */
(function($) 
{
    $.fn.innerfade = function(options) 
    {
        this.each(function()
        {
            var settings = 
            {
                animationtype: 'fade',
                speed: 'normal',
                timeout: 2000,
                type: 'sequence',
                containerheight: 'auto',
                runningclass: 'innerfade'
            };
            if(options)
                $.extend(settings, options);
                
            var elements = $(this).children();
            if (elements.length > 1) 
            {
                $(this).css('position', 'relative');
                $(this).css('height', settings.containerheight);
                $(this).addClass(settings.runningclass);
                for ( var i = 0; i < elements.length; i++ ) 
                {
                    $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute');
                    $(elements[i]).hide();
                };
                if ( settings.type == 'sequence' ) 
                {
                    setTimeout(function()
                    {
                        $.innerfade.next(elements, settings, 1, 0);
                    }, settings.timeout);
                    $(elements[0]).show();
                }
                else if ( settings.type == 'random' ) 
                {
                    setTimeout(function()
                    {
                        do 
                        { 
                            current = Math.floor ( Math.random ( ) * ( elements.length ) ); 
                        } 
                        while ( current == 0 )
                        $.innerfade.next(elements, settings, current, 0);
                    }, settings.timeout);
                    $(elements[0]).show();
                } 
                else 
                {
                    alert('type must either be \'sequence\' or \'random\'');
                }
            }
        });
    };
    $.innerfade = function() {}
    $.innerfade.next = function (elements, settings, current, last) 
    {
        if ( settings.animationtype == 'slide' ) 
        {
            $(elements[last]).slideUp(settings.speed, $(elements[current]).slideDown(settings.speed));
        }
        else if ( settings.animationtype == 'fade' ) 
        {
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed);
        } 
        else 
        {
            alert('animationtype must either be \'slide\' or \'fade\'');
        };
        if ( settings.type == 'sequence' ) 
        {
            if ( ( current + 1 ) < elements.length ) 
            {
                current = current + 1;
                last = current - 1;
            }
            else
            {
                current = 0;
                last = elements.length - 1;
            };
        } 
        else if ( settings.type == 'random' ) 
        {
            last = current;
            while ( current == last ) 
            {
                current = Math.floor ( Math.random ( ) * ( elements.length ) );
            };
        }
        else 
        {
            alert('type must either be \'sequence\' or \'random\'');
        };
        setTimeout((function(){$.innerfade.next(elements, settings, current, last);}), settings.timeout);
    };
})(jQuery);