从服务器获得一个准确时间的初始值，但是要能在客户端上像时钟一样不断的变化吧。也是为了防止客户端时间不太一致。...

<psan id="showTime"></span>

 

<%Date date=new Date();%>   //服务器时间

var time=parseInt('<%date.getTime()%>');   //得到服务器时间的毫秒数

var i=0;

function settime(){

var myyear,mymonth,myday,myhour,mymin,mysec,mytime;

    if(i==0){

     i=1;

   }else{

     time+=1000;

   }

   var mydate=new Date(time);  //把毫秒数赋值进去

  myyear=mydate.getFullYear();

  mymonth=mydate.getMonth()+1;

myday=mydate.getDate();

myhour=mydate.getHours()<10?'0'+mydate.getHours():mydate.getHours();

mymin=mydate.getMinutes()<10?'0'+mydate.getMinutes():mydate.getMinutes();

mysec=mydate.getSeconds()<10?'0'+mydate.getSeconds():mydate.getSeconds();

mytime="现在是"+myyear+"年"+mymonth+“月”+myday+“日”+myhour+“：”+mymin+“：”+mysec;

document.getElementById("showTime").innerHTML=mytime;

setTimeout('settime()',1000);

}

settime();