function animazione_flash() {

      document.write("<object type='application/x-shockwave-flash' data='img/top_base.swf'width='780' height='220' id='filmato'> ");
      document.write("<param name='movie' value='img/top_base.swf' /> ");
      document.write("<param name='quality' value='high' /><param name='wmode' value='opaque'/> ");
      document.write("</object> ");

}