<object id = "swf" type="application/x-shockwave-flash" data="fileUpload.swf?return_upload=0" width="550" height="400">
<param  name="upload" value="fileUpload.swf?return_upload=0" />
<p>Si l'utilisateur ne possède pas le plug-in</p>
</object>
	
	<span id="test">upload</span>
   

  <script type="text/javascript">
    var el = document.getElementById('test');
    var old_swf = document.getElementById('swf');

  
  
  el.onclick = function() { 
    old_swf.setAttribute("data","fileUpload.swf?return_upload=1");  
  };
   </script>