请教，如果我想取得系统日期的下个月份的今天值，可否有比较简单的函数？

Question

本月日期取得如下，可参考。
--------------------------------- 
function getCurmonth()
   {
     var newDate = new Date();
     //创建每月天数数组
     var monthDays = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
     //如果是闰年，2月份的天数为29天
     //if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) monthDays[1] = 29;
 
       //定义周日和月份中文名数组
       var monthNames = new Array("1","2","3","4","5","6","7","8","9","10","11","12");
        
       return monthNames[newDate.getMonth()];      
   }

Answer 1

<script language="LiveScript"> 
<!-- Hiding 
　today = new Date() 
　document.write("现在时间是　 ",today.getHours(),":", today.getMinutes()) 
　document.write("<br>今天日期为　 ", day.getMonth()+1,"/",today.getDate(),"/",today.getYear());
  document.write("<br>下个月的今天日期为　 ", day.getMonth()+2,"/",today.getDate(),"/",today.getYear()); 
</script>

Answer 2

<script language="LiveScript"> 
<!-- Hiding 
　today = new Date() 
　document.write("现在时间是　 ",today.getHours(),":", today.getMinutes()) 
　document.write("<br>今天日期为　 ", day.getMonth()+1,"/",today.getDate(),"/",today.getYear());
  document.write("<br>下个月的今天日期为　 ", day.getMonth()+2,"/",today.getDate(),"/",today.getYear()); 
// end hiding contents -->
</script>

Answer 3

得到某月的天数:<script language=javascript>
function getDayNumOfTheMonth(yearNum,monthNum)
{
return (new Date(yearNum+"/"+(monthNum+1)+"/0")).getDate();
}alert(getDayNumOfTheMonth(2000,2));
</script>

Answer 4

计算保质期<script language=javascript>
var produceDate=new Date('2000/02/01');//生产日期
var IDayNum=30;//保质期
var theLatestDate=new Date(produceDate.getFullYear(),produceDate.getMonth(),produceDate.getDate()+IDayNum);//过期日期
alert(produceDate);
alert(theLatestDate);
</script>

Answer 5

<script language="vbscript">
function JSDateAdd(interval, number, tDate)
    JSDateAdd = DateAdd(interval, number, CDate(tDate))
End Function
</script>
<script language="javascript">
var d = new Date();
alert(d)
alert(JSDateAdd("m", 1, d.toLocaleDateString()))
</script>