function realSysTime(clock){
var now=new Date(); //创建Date对象
var year=now.getFullYear(); //获取年份
var month=now.getMonth(); //获取月份
var date=now.getDate(); //获取日期
var day=now.getDay(); //获取星期
var hour=now.getHours(); //获取小时
var minu=now.getMinutes(); //获取分钟
var sec=now.getSeconds(); //获取秒钟
month=month+1;
var arr_week=new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
var week=arr_week[day]; //获取中文的星期
var time=year+"年"+month+"月"+date+"日 "+week+" "+hour+":"+minu+":"+sec; //组合系统时间
clock.innerHTML=time; //显示系统时间
}
window.onload=function(){
window.setInterval("realSysTime(clock)",1000); //实时获取并显示系统时间
}