求教:怎样获取昨天或明天日期

Question

<script language="javascript">
var today=new Date;
var week=new Array(7);
week[0]="日";
week[1]="一";
week[2]="二";
week[3]="三";
week[4]="四";
week[5]="五";
week[6]="六";
var usrMonth=today.getMonth()+1;
document.write(today.getYear()+"年"+usrMonth+"月"+today.getDate()+"日"+"  星期"+week[today.getDay()]);
</script这段代码能获取到当天的日期和星期几,怎样修改才能获取到明天,后天的日期,是星期几呢,请高手帮忙解决一下.

Answer 1

today.setUTCDate((today.getUTCDate()-1)); //前天today.setUTCDate((today.getUTCDate()+1)); //明天

Answer 2

谢谢楼上兄弟的解决,已经找到解决办法了.在我原来的代码加上再写一行代码就可以了.
<script language="javascript">
var today=new Date();
today.setTime(today.setDate(today.getDate()+1));
var week=new Array(7);
week[0]="日";
week[1]="一";
week[2]="二";
week[3]="三";
week[4]="四";
week[5]="五";
week[6]="六";
var usrMonth=today.getMonth()+1;
document.write(today.getYear()+"年"+usrMonth+"月"+today.getDate()+"日"+"  星期"+week[today.getDay()]);
</script>