效果: 
当前时间:2013年6月20日 星期一12:0:19
例子:
 
<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>
在页面中这样调用: