效果：  

当前时间：2011年6月20日 星期一12:0:19

 

 <mce:script language="javascript"><!-- function getTimeNow() { var time = new Date(); var hour = time.getHours(); var minute = time.getMinutes(); var second = time.getSeconds(); var week; var date; if(time.getDay()==0) week="星期日"; if(time.getDay()==1) week="星期一"; if(time.getDay()==2) week="星期二"; if(time.getDay()==3) week="星期三"; if(time.getDay()==4) week="星期四"; if(time.getDay()==5) week="星期五"; if(time.getDay()==6) week="星期六"; date=(time.getYear())+"年"+(time.getMonth()+1)+"月"+time.getDate()+"日"+" "; document.getElementById("nowTime").innerHTML ="当前时间："+date+week+ hour+":"+minute+":"+second; setTimeout("getTimeNow()",1000); } // --></mce:script>

 

 <body onload="getTimeNow()"> 关键地方。 <div ></</div>