codice:
<?xml version="1.0" encoding="iso-8859-1"?>

  <!DOCTYPE html 
    PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

  <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>
      <title>Code Example by DYNAMIC+</title>

      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
      <meta http-equiv="Content-Language" content="en-us" />

      <script type="text/javascript">
      <!--

        function showFileName( __hForm )
        {
          var _fileName  = __hForm.elements['file'].value;
          var _lastSlash = _fileName.lastIndexOf( '\\' ) + 1;

          if ( _lastSlash < 1 )
            _lastSlash = 0;
          

          alert( "Il nome del file è: " + _fileName.substring( _lastSlash ) );
        }


      //-->
      </script>



    </head>
    <body>

      <div style="text-align: center;">
        <form action="#" onsubmit="showFileName( this ); return false;">

          <input type="file" name="file" />

          <input type="submit" value=" Mostra nome del file " />

        </form>
      </div>

    </body>
  </html>