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

// 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: 'fast',
                     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);