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

// jquery.innerfade.js

// Datum: 2008-02-14
// Firma: Medienfreunde Hofmann & Baldes GbR
// Author: 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/
// and Ralf S. Engelschall http://trainofthoughts.org/

 *
 *  <ul id="news"> 
 *      <li>content 1</li>
 *      <li>content 2</li>
 *      <li>content 3</li>
 *  </ul>
 *  
 *  $('#news').innerfade({ 
 *    animationtype: Type of animation 'fade' or 'slide' (Default: 'fade'), 
 *    speed: Fading-/Sliding-Speed in milliseconds or keywords (slow, normal or fast) (Default: 'normal'), 
 *    timeout: Time between the fades in milliseconds (Default: '2000'), 
 *    type: Type of slideshow: 'sequence', 'random' or 'random_start' (Default: 'sequence'), 
 *    containerheight: Height of the containing element in any css-height-value (Default: 'auto'),
 *    runningclass: CSS-Class which the container get’s applied (Default: 'innerfade'),
 *    children: optional children selector (Default: null)
 *  }); 
 *

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


(function($) {

  var running = true;
  var currentTimer = 0;
  var cEl = 0;
  var lEl = 0;
  
  $.fn.innerfade = function(options) {
    return this.each(function() {   
      $.innerfade(this, options);
    });
  };
  
  $.innerfade = function(container, options) {
    
    var settings = {
      'animationtype':    'fade',
      'speed':            'normal',
      'type':             'sequence',
      'timeout':          2000,
      'containerheight':  'auto',
      'runningclass':     'innerfade',
      'children':         null
    };
    
    if (options)
      $.extend(settings, options);
    if (settings.children === null)
      var elements = $(container).children();
    else
      var elements = $(container).children(settings.children);
    
    if (elements.length > 1) {
	
      $(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
      for (var i = 0; i < elements.length; i++) {
        $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();

      // Add Listener To Control
        var id = $(elements[i]).attr('id');
        var rel = id.replace('postcard-li-', '');
        $('#postcard-controls li a[rel='+rel+']').click(function() {
        $.innerfade.stop();
        $.innerfade.change($(this).attr('rel'), elements, settings);
        return false;
      });
	
      };
      if (settings.type == "sequence") {
        currentTimer = setTimeout(function() {
          $.innerfade.next(elements, settings, 1, 0);
        }, settings.timeout);
        $(elements[0]).show();
      } else if (settings.type == "random") {
        var last = Math.floor ( Math.random () * ( elements.length ) );
        currentTimer = setTimeout(function() {
          do { 
            current = Math.floor ( Math.random ( ) * ( elements.length ) );
          } while (last == current );             
          $.innerfade.next(elements, settings, current, last);
        }, settings.timeout);
        $(elements[last]).show();
      } else if ( settings.type == 'random_start' ) {
        settings.type = 'sequence';
        var current = Math.floor ( Math.random () * ( elements.length ) );
        currentTimer = setTimeout(function(){
          $.innerfade.next(elements, settings, (current + 1) %  elements.length, current);
        }, settings.timeout);
        $(elements[current]).show();
      } else {
        alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
      }
    }
    
  };
  
  $.innerfade.change = function(id, elements, settings) {
    
    $.innerfade.stop();
    
    if (settings.animationtype == 'fade') {
      
      if(lEl != parseInt(id)){
	$(elements[lEl]).fadeOut('normal');
      
	$(elements[id]).fadeIn('normal', function() {
	  removeFilter($(this)[0]);
	  $('#postcard-controls li').removeClass('active');      
	  $('#postcard-controls li a[rel='+id+']').parent('li').addClass('active');
	});
      }
      
      $(elements[lEl]).bind('hover', function(){return false});
      
      id = parseInt(id);
      
      if ((id + 1) < elements.length) {
        cEl = id + 1;
        lEl = id;
      } else {
        cEl = 0;
        lEl = id;
      }
      
      $(elements[id]).hover(function() { $.innerfade.stop(); }, function() {$.innerfade.start(elements, settings, cEl, lEl)});
      $.innerfade.start(elements, settings, cEl, lEl);
    }
  };
  
  $.innerfade.stop = function() {
    running = false;
    clearTimeout(currentTimer);
  };
    
  $.innerfade.start = function(elements, settings, current, last) {
    running = true;
    clearTimeout(currentTimer);
    
    currentTimer = setTimeout((function() {
      $.innerfade.next(elements, settings, current, last);
    }), settings.timeout);
  };
    
  $.innerfade.next = function(elements, settings, current, last) {
    
    if(!running) {
      return;
    }
    
    if (settings.animationtype == 'slide') {
      $(elements[last]).slideUp(settings.speed);
      $(elements[current]).slideDown(settings.speed);
    } else if (settings.animationtype == 'fade') {
      
      $(elements[last]).fadeOut(settings.speed);
      
      $(elements[current]).fadeIn(settings.speed, function() {
        removeFilter($(this)[0]);
        $('#postcard-controls li').removeClass('active');
        
        var id = $(this).attr('id');
        var rel = id.replace('postcard-li-', '');
        $('#postcard-controls li a[rel='+rel+']').parent('li').addClass('active');
      });
      
      $(elements[last]).bind('hover', function(){return false});
      $(elements[current]).hover(function() { $.innerfade.stop(); }, function() {$.innerfade.start(elements, settings, current, last)});
      
    } else
      alert('Innerfade-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('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
    
    cEl = current;
    lEl = last;
    
    currentTimer = setTimeout((function() {
      $.innerfade.next(elements, settings, current, last);
    }), settings.timeout);
  };

})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
  if(element.style.removeAttribute){
    element.style.removeAttribute('filter');
  }
}