function tick()
{
var year,month,day,hours,minutes,seconds,ap;
var intYear,intMonth,intDay,intHours,intMinutes,intSeconds,intweekday,weekday;
var today;
today=new Date();
intYear=today.getYear();
intMonth=today.getMonth()+1;
intDay=today.getDate();
intHours=today.getHours();
intMinutes=today.getMinutes();
intSeconds=today.getSeconds();
intweekday=today.getDay();
if(intweekday == 0)
weekday=" 星期日 ";
else if(intweekday == 1)
weekday=" 星期一 ";
else if(intweekday == 2)
weekday=" 星期二 ";
else if(intweekday == 3)
weekday=" 星期三 ";
else if(intweekday == 4)
weekday=" 星期四 ";
else if(intweekday == 5)
weekday=" 星期五 ";
else if(intweekday == 6)
weekday=" 星期六 ";
//获取系统时间的小时数
if(intHours==0)
{
hours=intHours+":";
ap="凌晨";
}
else if(intHours<12)
{
hours=intHours+":";
ap="上午";
}
else if(intHours==12)
{
hours=intHours+":";
ap="中午";
}
else
{
intHours=intHours-12;
hours=intHours+":";
ap="下午";
}
//获取系统时间的分数
if(intMinutes<10)
{
minutes="0"+intMinutes+":";
}
else
minutes=intMinutes+":";
//获取系统时间的秒数
if(intSeconds<10)
seconds="0"+intSeconds+" ";
else
seconds=intSeconds+" ";
timeString='北京时间：'+intYear+'年'+intMonth+'月'+intDay+'日  '+ap+hours+minutes+seconds+weekday;
Clock.innerHTML=timeString;
//每隔0.1秒钟执行一次tick函数
window.setTimeout("tick()",100);
}
window.onload=tick;