da verstehe ich zuwenig von der Sprache, was da wirklich geändert werden und passieren muss.
So kommt jedenfalls nur Murks raus:

Code:
<!--
// Released under the GPL license
// http://www.opensource.org/licenses/gpl-license.php
//
// **********************************************************************
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
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// https://www.onvista.de/index/DAX-Index-20735

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<html lang="en">
  <head>
    <script type="text/javascript" src="https://www.onvista.de/index/DAX-Index-20735"></script>
    <script type="text/javascript">
      $(document).ready(function () {  //start after HTML, images have loaded

        var InfiniteRotator = 
        {
          init: function()
          {
            //initial fade-in time (in milliseconds)
            var initialFadeIn = 1000;
            
            //interval between items (in milliseconds)
            var itemInterval = 5000;
            
            //cross-fade time (in milliseconds)
            var fadeTime = 2500;
            
            //count number of items
            var numberOfItems = $('.rotating-item').length;
      
            //set current item
            var currentItem = 0;
      
            //show first item
            $('.rotating-item').eq(currentItem).fadeIn(initialFadeIn);
            alert("PREPARED");
      
            //loop through the items    
            var infiniteLoop = setInterval(function(){
              $('.rotating-item').eq(currentItem).fadeOut(fadeTime);
               alert("ROTATING");
              if(currentItem == numberOfItems -1){
                currentItem = 0;
              }else{
                currentItem++;
              }
              $('.rotating-item').eq(currentItem).fadeIn(fadeTime);
      
            }, itemInterval); 
            alert("DONE");
          } 
        };
      
        InfiniteRotator.init();
        
      });
    </script>    <meta charset="utf-8" />
    <title>Infinite Rotating Images Using jQuery (JavaScript) - Unstyled</title>
  </head>
  <body>

    <h1>Infinite Rotating Images Using jQuery (JavaScript) - Unstyled</h1>
    <div id="rotating-item-wrapper">
      <div class="rotating-item"><object type="text/html" data="https://www.onvista.de/index/MDAX-Index-323547" /></div>
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      <div class="rotating-item"><object type="text/html" data="https://www.onvista.de/aktien/Alibab...e-US01609W1027" /></div>
      <div class="rotating-item"><object type="text/html" data="www.onvista.de/aktien/Facebo...e-US30303M1027" /></div>
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   </body>