可以用Javascript来实现:
<script type="text/javascript">
function show()
{ var time=new Date();
var year=time.getYear();
var month=time.getMonth()+1;
var day=time.getDate();
var hours=time.getHours();
var minute=time.getMinutes();
var sconds=time.getSeconds(); var ss="";
var mi=null; var sc=null;
if(hours>=0&&hours<12) { ss="上午好!"; }
else if(hours>=12&&hours<24) { ss="下午好!"; }
if(minute<10){ mi="0"+minute; }
else{ mi=minute; }
if(sconds<10){ sc="0"+sconds; }
else{ sc=sconds; }
var st="今天日期:<font size='2' style='color:red;
'>"+year+"年"+month+"月"+day+"日</font>"+ " "+"现在时间:<font size='2' style='color:red;
'>"+ hours+":"+mi+":"+sc+"</font>"; document.getElementById("aaa").innerHTML=ss; document.getElementById("mydate").innerHTML=st; window.setTimeout("show()",1000); } </script>
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