set concrete image title in images collection with concrete span value from span collection

set concrete image title in images collection with concrete span value from span collection

Hi, I have this sites: index.html with this code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
   <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
    <script type="text/javascript">
      function loadContent(elementSelector, sourceUrl) {
        jQuery(elementSelector).load(sourceUrl, myInit);
      }
    </script>
  </head>
  <body>
    <div id="menu">
      <a href="javascript:loadContent('#content', 'selectors.html');">selectors</a><br/>
    </div>
    <div id="content">













    </div>
  </body>
</html>


and on selectors.html I have this:
<img src="imgs/image.jpg" class="myPicture" title="no text 1"/><span class="myClass">1. span</span><br/>
<img src="imgs/image.jpg" class="myPicture" title="no text 2"/><span class="myClass">2. span</span><br/>
<img src="imgs/image.jpg" class="myPicture" title="no text 3"/><span class="myClass">3. span</span><br/>
<button onclick="setTitleToImage(1);">Set title</button>
 
  <script>
    function setTitleToImage(myIndex) {
      var spanValue = jQuery('.myClass').get(myIndex).text();






      jQuery('.myPicture').get(myIndex).attr('title', spanValue);     
    }
  </script>

what I need is set an image title with given index (1) with value of span with given index (1). I tried some laborations with gt(), index(), but there is no success. This code is not running too:-( Can anybody help me?
Thanks