看看这个。
//日期增加函数
function dateAdd(strInterval, NumDay, dtDate) {
var dtTmp = new Date(dtDate)
if (isNaN(dtTmp)) dtTmp = new Date()
switch (strInterval) {
case "s":return new Date(Date.parse(dtTmp) + (1000 * NumDay))
case "n":return new Date(Date.parse(dtTmp) + (60000 * NumDay))
case "h":return new Date(Date.parse(dtTmp) + (3600000 * NumDay))
case "d":return new Date(Date.parse(dtTmp) + (86400000 * NumDay))
case "w":return new Date(Date.parse(dtTmp) + ((86400000 * 7) * NumDay))
case "m":return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + NumDay, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds())
case "y":return new Date((dtTmp.getFullYear() + NumDay), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds())
}
}
//将日期beginDate加上一天
//strDateList = dateAdd("d", 1, new Date()).toLocaleString()
strDateList = dateAdd("d", 1, '2012/09/28').toLocaleString()
另赠送你一个函数：
//| 求两个时间的天数差 日期格式为 YYYY-MM-dd
function daysBetween(DateOne,DateTwo)
{
var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-'))
var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1)
var OneYear = DateOne.substring(0,DateOne.indexOf ('-'))
var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-'))
var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1)
var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-'))
var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000)
return Math.abs(cha)}
JS有自带的日期函数，获取如下：var date = new Date()var year = date.getFullYear()//获取年份var month = date.getMonth()+1//获取月份，因为是从0-11所以要+1var day = date.getDate()//获取天数var hour = date.getHours()//获取小时var minute = date.getMinutes()//获取分钟var second = date.getSeconds()//获取秒给一个代码例子：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<meta http-equiv="Content-Type" content="text/html charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form name="d_reg_form" id="d_reg_form" action="">
<select name="year" size="1" onChange="return CheckDay()">
<script language="javascript">
for(i=2050i>=1940i--)
{
document.write('<option value="'+i+'">'+i+'</option>')
}
</script>
</select>年
<select name="month" size="1" onChange="return CheckDay()">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>月
<select name="day" size="1"></select>日
<script>
function CheckDay(){
var YearNo,MonthNo,DayNo
YearNo = document.d_reg_form.year.value
MonthNo = document.d_reg_form.month.value
var i,j,DayCount
if(MonthNo==1 || MonthNo==3 || MonthNo==5 || MonthNo==7 || MonthNo==8 || MonthNo==10 || MonthNo==12)
{DayCount = 31}
if(MonthNo==4 || MonthNo==6 || MonthNo==9 || MonthNo==11 )
{DayCount = 30}
if(MonthNo==2){
if(IsRunY(YearNo)){
DayCount = 29
}else{
DayCount = 28
}
}
document.d_reg_form.day.length=DayCount
for (i=0i<=DayCount-1i++)
{
document.d_reg_form.day[i]=new Option(i+1)
document.d_reg_form.day[i].value=i+1
}
}
function IsRunY(YearNo)
{
// 能被4整除却不能被100整除 或能被400整除的年份
// 则是闰年
if ((YearNo % 4 == 0 && YearNo % 100 != 0) || YearNo % 400 == 0){
return true
}else{
return false
}
}
CheckDay()
</script>
</form>
</body>
</html>
