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

// 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);