把如下的代码，放到网页中的Body中的相应位置，就可以让网页在打开的时候，自动显示本机的日期和星期。
script language="javascript">
<!--
today=new Date();
var week; var date;
if(today.getDay()==0) week="星期日"
if(today.getDay()==1) week="星期一"
if(today.getDay()==2) week="星期二"
if(today.getDay()==3) week="星期三"
if(today.getDay()==4) week="星期四"
if(today.getDay()==5) week="星期五"
if(today.getDay()==6) week="星期六"
date=(today.getYear())+"年"+(today.getMonth()+1)+"月"+today.getDate()+"日"+" "
document.write("<span style='font-size: 13pt;'>"+date+week+"</span>");
// -->
</script>