document.write('<object type="application/x-shockwave-flash" data="img/nave8.swf" width="374" height="120">');
document.write('<param name="movie" value="img/nave8.swf" />'); 
document.write('<param name="quality" value="high" />');
document.write('<img src="img/imganimacion.gif" width="374" height="120" alt="Animacion de fotos de la nave" />');
document.write('</object>');