function animazione_flash() {
      document.write("<object type='application/x-shockwave-flash' data='images/intro_4.swf' width= "765" height= "290" id='filmato'> ");
      document.write("<param name='movie' value='images/intro_4.swf' /> ");
      document.write("<param name='quality' value='high' /><param name='wmode' value='transparent' /> ");
      document.write("</object> ");
}