
var so = new SWFObject('player.swf', 'mpl', '420', '310', '9');
so.addParam('allowscriptaccess', 'always');
so.addParam('allowfullscreen', 'true');
so.addParam('flashvars', 'file=plp.xml&volume=80&autostart=true&fullscreen=true');
so.write('player');
...