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js获取当前日期的前一天、一月、一年的日期 明天、后天

2012-02-15 13:09 585 查看
function getYestoday(date){
var yesterday_milliseconds=date.getTime()-1000*60*60*24;
var yesterday = new Date();
yesterday.setTime(yesterday_milliseconds);

var strYear = yesterday.getFullYear();
var strDay = yesterday.getDate();
var strMonth = yesterday.getMonth()+1;
if(strMonth<10)
{
strMonth="0"+strMonth;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}

//获得上个月在昨天这一天的日期
function getLastMonthYestdy(date){
var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);
var strYear = date.getFullYear();
var strDay = date.getDate();
var strMonth = date.getMonth()+1;
if(strYear%4 == 0 && strYear%100 != 0){
daysInMonth[2] = 29;
}
if(strMonth - 1 == 0)
{
strYear -= 1;
strMonth = 12;
}
else
{
strMonth -= 1;
}
strDay = daysInMonth[strMonth] >= strDay ? strDay : daysInMonth[strMonth];
if(strMonth<10)
{
strMonth="0"+strMonth;
}
if(strDay<10)
{
strDay="0"+strDay;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}

//获得上一年在昨天这一天的日期
function getLastYearYestdy(date){
var strYear = date.getFullYear() - 1;
var strDay = date.getDate();
var strMonth = date.getMonth()+1;
if(strMonth<10)
{
strMonth="0"+strMonth;
}
if(strDay<10)
{
strDay="0"+strDay;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}

function getYestoday(date){
var yesterday_milliseconds=date.getTime()-1000*60*60*24;
var yesterday = new Date();
yesterday.setTime(yesterday_milliseconds);

var strYear = yesterday.getFullYear();
var strDay = yesterday.getDate();
var strMonth = yesterday.getMonth()+1;
if(strMonth<10)
{
strMonth="0"+strMonth;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}

//获得上个月在昨天这一天的日期
function getLastMonthYestdy(date){
var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);
var strYear = date.getFullYear();
var strDay = date.getDate();
var strMonth = date.getMonth()+1;
if(strYear%4 == 0 && strYear%100 != 0){
daysInMonth[2] = 29;
}
if(strMonth - 1 == 0)
{
strYear -= 1;
strMonth = 12;
}
else
{
strMonth -= 1;
}
strDay = daysInMonth[strMonth] >= strDay ? strDay : daysInMonth[strMonth];
if(strMonth<10)
{
strMonth="0"+strMonth;
}
if(strDay<10)
{
strDay="0"+strDay;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}

//获得上一年在昨天这一天的日期
function getLastYearYestdy(date){
var strYear = date.getFullYear() - 1;
var strDay = date.getDate();
var strMonth = date.getMonth()+1;
if(strMonth<10)
{
strMonth="0"+strMonth;
}
if(strDay<10)
{
strDay="0"+strDay;
}
datastr = strYear+"-"+strMonth+"-"+strDay;
return datastr;
}
//获得下个月在昨天这一天的日期

function getLastMonthYestdy2(date){

var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);

var strYear = date.getFullYear();

var strDay = date.getDate();

var strMonth = date.getMonth()+1;

if(strYear%4 == 0 && strYear%100 != 0){

daysInMonth[2] = 29;

}

if(strMonth + 1 == 13)

{

strYear += 1;

strMonth = 1;

}

else

{

strMonth += 1;

}

strDay = daysInMonth[strMonth] >= strDay ? strDay : daysInMonth[strMonth];

if(strMonth<10)

{

strMonth="0"+strMonth;

}

if(strDay<10)

{

strDay="0"+strDay;

}

datastr = strYear+"-"+strMonth+"-"+strDay;

return datastr;

}

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>js获取日期：前天、昨天、今天、明天、后天 - Liehuo.Net</title>

</head>

<body>

<script language="JavaScript" type="text/javascript">

function GetDateStr(AddDayCount)
{
var dd = new Date();

dd.setDate(dd.getDate()+AddDayCount);//获取AddDayCount天后的日期
var y = dd.getYear();

var m = dd.getMonth()+1;//获取当前月份的日期

var d = dd.getDate();

return y+"-"+m+"-"+d;
}
document.write("前天："+GetDateStr(-2));
document.write("<br />昨天："+GetDateStr(-1));

document.write("<br />今天："+GetDateStr(0));

document.write("<br />明天："+GetDateStr(1));

document.write("<br />后天："+GetDateStr(2));

document.write("<br />大后天："+GetDateStr(3));

</script>

</body>

</html>
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