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

// 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);