Cambiar el valor de un Iframe con un onchange en un fileupload

[fmb1982]

Compañeros esto no me jala, agradecere su apoyo y sugerencias!!!

Código HTML:

<script type="text/javascript">
function Lifra(ifr)
{
document.all.miIframe.src=ifr.value;	
}
</script>

  <div id="izq">
  <form enctype="multipart/form-data" name="form1" action="save_.php" method="POST">
    <table width="557" border="0"><tr>
      <td width="551"><p align="left" class="style1"><strong>BUSCAR PDF</strong></p>
        <p align="left" class="style1">
          <input name="uploadedfile" type="file" size="80" maxlength="50" class="b1" onChange="lifr('this.form.uploadfile')"/>
          <input type="submit" value="Guardar" class="b2"/>
          </tr></table>
  </form>
  </div>
  <div id="der">   
  <iframe id="miIframe" name="miIframe" src="" width="640" height="750"></iframe>        
  </div>