function animazione_flash(num) {

      document.write("<object type='application/x-shockwave-flash' data='intro"+num+".swf'width='700' height='500' id='filmato"+num+"'> ");
      document.write("<param name='movie' value='intro"+num+".swf'> ");
      document.write("<param name='quality' value='high'>");
      document.write("</object> ");

}