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

// 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($) {

 $.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();
     };  
     if (settings.type == "sequence") {
         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 ) );
         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 ) );
         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.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);
         $(elements[current]).fadeIn(settings.speed, function() {
                 removeFilter($(this)[0]);
                 });
     } 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\'');
     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');
    }
}