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

// 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);