function counter() {
   var date = new Date();
   var year = date.getFullYear();    var date2 = new Date(year, 12, 31, 23, 59, 59);    /*转换成秒*/
   var time = (date2 - date) / 1000;    var day = Math.floor(time / (24 * 60 * 60))    var hour = Math.floor(time % (24 * 60 * 60) / (60 * 60))    var minute = Math.floor(time % (24 * 60 * 60) % (60 * 60) / 60);    var second = Math.floor(time % (24 * 60 * 60) % (60 * 60) % 60);    var str = year + "年还剩" + day + "天" + hour + "时" + minute + "分" + second + "秒";    console.log(str);
}window.setInterval("counter()", 1000);