<html>
<body>
选择开始日期: <input type="date" id="start_date" />
选择结束日期: <input type="date" id="end_date" />
<hr/>
<button type="submit" onclick="end_date=new Date(document.getElementById('end_date').value)
start_date=new Date(document.getElementById('start_date').value)
document.getElementById('showhowmanyday').innerText=(end_date.getTime()-start_date.getTime())/(24*3600*1000)">计算两个日期相差的天数</button>
<h1 id="showhowmanyday"/>
</body>
</html>
<SCRIPT LANGUAGE="JavaScript"><!--
function deal(){
//var Y = 6
//var R ="2009-11-01"
var R = document.getElementById('date').value +''
var Y = document.getElementById('month').value
alert(R)
var year=R.substr(0,4)
var month=R.substr(5,2)
var day=R.substr(8,2)
if((parseInt(month)+parseInt(Y)) >12){
year++
month = parseInt(month) + parseInt(Y) - 12
}else{
month = parseInt(month) + parseInt(Y)
}
alert(year+"-"+month+"-"+day)
R = new Date(year,month,day,00,00,00)
dateNow = new Date()
var diff = R.getTime() - dateNow.getTime()
var days = Math.floor(diff/(1000*60*60*24))
var str = "与今天相差" + days + "天"
if(R >dateNow){
alert("大于今天!"+"\n"+str)
}else{
alert("小于今天!"+"\n"+str)
}
}
//-->
</SCRIPT>
月<input type="text" id="month" value="6">
日期 <input type="text" id="date" value="2009-11-01">
<input type="button" value="submit" onClick="deal()">
这样的吗
var myDate = new Date()
myDate.getYear() //获取当前年份(2位)
myDate.getFullYear() //获取完整的年份(4位,1970-????)
myDate.getMonth() //获取当前月份(0-11,0代表1月)
myDate.getDate() //获取当前日(1-31)
myDate.getDay() //获取当前星期X(0-6,0代表星期天)
myDate.getTime() //获取当前时间(从1970.1.1开始的毫秒数)
myDate.getHours() //获取当前小时数(0-23)
myDate.getMinutes() //获取当前分钟数(0-59)
myDate.getSeconds() //获取当前秒数(0-59)
myDate.getMilliseconds() //获取当前毫秒数(0-999)
myDate.toLocaleDateString() //获取当前日期
var mytime=myDate.toLocaleTimeString() //获取当前时间
myDate.toLocaleString( ) //获取日期与时间
日期时间脚本库方法列表
Date.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天数
Date.prototype.WeekNumOfYear 判断日期所在年的第几周
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差
js代码：
//---------------------------------------------------
// 判断闰年
//---------------------------------------------------
Date.prototype.isLeapYear = function()
{
return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)))
}
//---------------------------------------------------
// 日期格式化
// 格式 YYYY/yyyy/YY/yy 表示年份
// MM/M 月份
// W/w 星期
// dd/DD/d/D 日期
// hh/HH/h/H 时间
// mm/m 分钟
// ss/SS/s/S 秒
//---------------------------------------------------
Date.prototype.Format = function(formatStr)
{
var str = formatStr
var Week = ['日','一','二','三','四','五','六']
str=str.replace(/yyyy|YYYY/,this.getFullYear())
str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100))
str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth())
str=str.replace(/M/g,this.getMonth())
str=str.replace(/w|W/g,Week[this.getDay()])
str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate())
str=str.replace(/d|D/g,this.getDate())
str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours())
str=str.replace(/h|H/g,this.getHours())
str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes())
str=str.replace(/m/g,this.getMinutes())
str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds())
str=str.replace(/s|S/g,this.getSeconds())
return str
}
//+---------------------------------------------------
//| 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)
}
//+---------------------------------------------------
//| 日期计算
//+---------------------------------------------------
Date.prototype.DateAdd = function(strInterval, Number) {
var dtTmp = this
switch (strInterval) {
case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number))
case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number))
case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number))
case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number))
case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number))
case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds())
case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds())
case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds())
}
}
//+---------------------------------------------------
//| 比较日期差 dtEnd 格式为日期型或者有效日期格式字符串
//+---------------------------------------------------
Date.prototype.DateDiff = function(strInterval, dtEnd) {
var dtStart = this
if (typeof dtEnd == 'string' )//如果是字符串转换为日期型
{
dtEnd = StringToDate(dtEnd)
}
switch (strInterval) {
case 's' :return parseInt((dtEnd - dtStart) / 1000)
case 'n' :return parseInt((dtEnd - dtStart) / 60000)
case 'h' :return parseInt((dtEnd - dtStart) / 3600000)
case 'd' :return parseInt((dtEnd - dtStart) / 86400000)
case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7))
case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1)
case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear()
}
}
//+---------------------------------------------------
//| 日期输出字符串，重载了系统的toString方法
//+---------------------------------------------------
Date.prototype.toString = function(showWeek)
{
var myDate= this
var str = myDate.toLocaleDateString()
if (showWeek)
{
var Week = ['日','一','二','三','四','五','六']
str += ' 星期' + Week[myDate.getDay()]
}
return str
}
//+---------------------------------------------------
//| 日期合法性验证
//| 格式为：YYYY-MM-DD或YYYY/MM/DD
//+---------------------------------------------------
function IsValidDate(DateStr)
{
var sDate=DateStr.replace(/(^\s+|\s+$)/g,'') //去两边空格
if(sDate=='') return true
//如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''
//数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式
var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'')
if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
{
var t=new Date(sDate.replace(/\-/g,'/'))
var ar = sDate.split(/[-/:]/)
if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())
{
//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。')
return false
}
}
else
{
//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。')
return false
}
return true
}
//+---------------------------------------------------
//| 日期时间检查
//| 格式为：YYYY-MM-DD HH:MM:SS
//+---------------------------------------------------
function CheckDateTime(str)
{
var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/
var r = str.match(reg)
if(r==null)return false
r[2]=r[2]-1
var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6])
if(d.getFullYear()!=r[1])return false
if(d.getMonth()!=r[2])return false
if(d.getDate()!=r[3])return false
if(d.getHours()!=r[4])return false
if(d.getMinutes()!=r[5])return false
if(d.getSeconds()!=r[6])return false
return true
}
//+---------------------------------------------------
//| 把日期分割成数组
//+---------------------------------------------------
Date.prototype.toArray = function()
{
var myDate = this
var myArray = Array()
myArray[0] = myDate.getFullYear()
myArray[1] = myDate.getMonth()
myArray[2] = myDate.getDate()
myArray[3] = myDate.getHours()
myArray[4] = myDate.getMinutes()
myArray[5] = myDate.getSeconds()
return myArray
}
//+---------------------------------------------------
//| 取得日期数据信息
//| 参数 interval 表示数据类型
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒
//+---------------------------------------------------
Date.prototype.DatePart = function(interval)
{
var myDate = this
var partStr=''
var Week = ['日','一','二','三','四','五','六']
switch (interval)
{
case 'y' :partStr = myDate.getFullYear()break
case 'm' :partStr = myDate.getMonth()+1break
case 'd' :partStr = myDate.getDate()break
case 'w' :partStr = Week[myDate.getDay()]break
case 'ww' :partStr = myDate.WeekNumOfYear()break
case 'h' :partStr = myDate.getHours()break
case 'n' :partStr = myDate.getMinutes()break
case 's' :partStr = myDate.getSeconds()break
}
return partStr
}
//+---------------------------------------------------
//| 取得当前日期所在月的最大天数
//+---------------------------------------------------
Date.prototype.MaxDayOfDate = function()
{
var myDate = this
var ary = myDate.toArray()
var date1 = (new Date(ary[0],ary[1]+1,1))
var date2 = date1.dateAdd(1,'m',1)
var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'))
return result
}
//+---------------------------------------------------
//| 取得当前日期所在周是一年中的第几周
//+---------------------------------------------------
Date.prototype.WeekNumOfYear = function()
{
var myDate = this
var ary = myDate.toArray()
var year = ary[0]
var month = ary[1]+1
var day = ary[2]
document.write('< script language=VBScript\> \n')
document.write('myDate = Datue(''+month+'-'+day+'-'+year+'') \n')
document.write('result = DatePart('ww', myDate) \n')
document.write(' \n')
return result
}
//+---------------------------------------------------
//| 字符串转成日期类型
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
//+---------------------------------------------------
function StringToDate(DateStr)
{
var converted = Date.parse(DateStr)
var myDate = new Date(converted)
if (isNaN(myDate))
{
//var delimCahar = DateStr.indexOf('/')!=-1?'/':'-'
var arys= DateStr.split('-')
myDate = new Date(arys[0],--arys[1],arys[2])
}
return myDate
}
若要显示:当前日期加时间(如:2009-06-12 12:00)
function CurentTime()
{
var now = new Date()
var year = now.getFullYear() //年
var month = now.getMonth() + 1 //月
var day = now.getDate() //日
var hh = now.getHours() //时
var mm = now.getMinutes() //分
var clock = year + "-"
if(month < 10)
clock += "0"
clock += month + "-"
if(day < 10)
clock += "0"
clock += day + " "
if(hh < 10)
clock += "0"
clock += hh + ":"
if (mm < 10) clock += '0'
clock += mm
return(clock)
}
这是我博客里的一篇文章。上边有清晰的思路。你自己改改。
