var flashvars = { };
 var params = { allowScriptAccess:'always' };
 var attributes = { id:'myytplayer' };
 swfobject.embedSWF(
    'http://www.youtube.com/v/nGt2zEjak58?enablejsapi=1&playerapiid=ytplayer',
    'video',
    '240',
    '190',
    '8.0.0', /*  Flash Player8 以降を指定 */
    'lib/swfobject/expressInstall.swf',
    flashvars,
    params,
    attributes
 );
 $(function(){
    /* 再生/一時停止 */
    $('#btn_play').toggle(function(){
       if(ytplayer) ytplayer.playVideo();
    },function(){
       if(ytplayer) ytplayer.pauseVideo();
    });
    /* 停止 */
    $('#btn_stop').click(function(){
       if(ytplayer) ytplayer.stopVideo();
    });
 });
 /* プレーヤーの準備ができると呼ばれる関数 */
 function onYouTubePlayerReady(playerId) {
    ytplayer = document.getElementById('myytplayer');
		ytplayer.setVolume(0); //音量0に設定
 }