function time(){
var date = new Date(); //获取系统时间
var year = date.getFullYear(); //当前公元年份
var month = date.getMonth(); //当前月份-1,所以后面显示的年份有+1
var day = date.getDate(); //当前天数,getDay()表示当前星期几
var hour = date.getHours(); //当前小时~小时,分钟,秒 get后面都有s
var minute = date.getMinutes();
var second = date.getSeconds();
var $time = $("time");
var txt = year + "年" + (month + 1) + "月" + day + "日 " + hour + ":" + minute + ":" + second;
$time.text(txt);
}
setInterval("time()",1000); //一秒更新一次
原文:http://my.oschina.net/u/2312977/blog/402582