Uploas & récupere variable en javascript

Bonjour tous le monde,
j'ai un petit souci avec cette script qui marche parfaitement, mon problème c de comment récupérer un variable (le nom de fichier de la page de traitement upload.php ver la page index j'ai essayer plusieurs méthode mais malgré ...)

voici la page index.php
-----------------------------------------------------------------------------------------------------------
<script language="javascript" type="text/javascript">
<!--
function startUpload(){
      document.getElementById('f1_upload_process').style.visibility = 'visible';
      document.getElementById('f1_upload_form').style.visibility = 'hidden';
      return true;
}

function stopUpload(success){
      var result = '';
      if (success == 1){
         result = '<span class="msg">Fichier bien uploder Ajouter D\'autre fichiers!<\/span><br/><br/>';
      }
      else {
         result = '<span class="emsg">ERREUR!<\/span><br/><br/>';
      }
      document.getElementById('f1_upload_process').style.visibility = 'hidden';
      document.getElementById('f1_upload_form').innerHTML = result + '<label>File: <input name="myfile" type="file" size="30" /><\/label><label><input type="submit" name="submitBtn" class="sbtn" value="Upload" /><\/label>';
      document.getElementById('f1_upload_form').style.visibility = 'visible';     
      return true;  
}
//-->
</script>  
</head><div id="container"><div id="content">
             <form action="upload.php" method="post" enctype="multipart/form-data" target="upload_target" onsubmit="startUpload();" >
             <p id="f1_upload_process"><img src="loader.gif" /><br/></p>
             <p id="f1_upload_form" align="center">
             <input name="myfile" type="file" size="30" />
             <input type="submit" name="submitBtn" value="Upload" /> 
             </p><iframe id="upload_target" name="upload_target" src="#" style="width:0;height:0;border:0px solid #fff;"></iframe>
             </form>
             </div></div>
---------------------------------------------------------------------------------------------------------------
et voila la page upload.php
---------------------------------------------------------------------------------------------------------------
<?php
   $destination_path = getcwd().DIRECTORY_SEPARATOR;
   $result = 0;
   $target_path = $destination_path . basename( $_FILES['myfile']['name']);
   if(@move_uploaded_file($_FILES['myfile']['tmp_name'], $target_path)) {
      $result = 1;
   }
?>

<script language="javascript" type="text/javascript">window.top.window.stopUpload(<?php echo $result; ?>);</script> 



Merci d'avance