var reproductor = new SWFObject("mediaplayer.swf","player","800","550","7");

reproductor.addParam("allowfullscreen","true");

reproductor.addParam("allowscriptaccess","always");

reproductor.addVariable('file','publicacion.flv');
reproductor.addVariable("autostart", "true");
reproductor.addVariable('image','captura.jpg');

reproductor.addParam("wmode","opaque");

reproductor.addVariable("width","800");

reproductor.addVariable("height","550");

reproductor.write('video');