js加一天减一天
<SCRIPT language="javascript">function addDate(dd,dadd){var a = new Date(dd)a = a.valueOf()a = a + dadd * 24 * 60 * 60 * 1000a = new Date(a)return a;}//抓取現在日期var now = new Date("2008/03/01");var years = now.getYear()+1;var months = now.getMonth()+1;var days = now.getDate();var hours = now.getHours();//抓取前一天日期NextNow = addDate(months+"/"+days+"/"+years,-1);years = NextNow.getYear();months = NextNow.getMonth()+1;days = NextNow.getDate();alert("加一年减一天的日期:"+years+"年"+months+"月"+days+"日");</SCRIPT>