js 怎么计算上一周下一周？
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两个文本框：开始日期结束日期两个按键：上一周下一周分别点击两个按键的时候，怎么计算出开始时期，结束日期
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!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>无标题文档</title>
</head>
<script language="javascript">
function setWeekTime(weekTime)
var time=new Array();
if(weekTime=='last')
time=getLastWeekDate();
if(weekTime=='this')
time=getThisWeekDate();
if(weekTime=='next')
time=getNextWeekDate();
form1.monday.value=time[0];
form1.tuesday.value=time[1];
form1.wednesday.value=time[2];
form1.thursday.value=time[3];
form1.friday.value=time[4];
form1.saturday.value=time[5];
form1.sunday.value=time[6];
//获得本周的周一和周末
function getThisWeekDate()
var now = new Date();
var week=new Array();
var currentWeek = now.getDay();
if ( currentWeek == 0 )
currentWeek = 7;
var monday = now.getTime() - (currentWeek-1)*24*60*60*1000; //星期一
var tuesday = now.getTime() - (currentWeek-2)*24*60*60*1000; //星期二
var wednesday = now.getTime() - (currentWeek-3)*24*60*60*1000; //星期三
var thursday = now.getTime() - (currentWeek-4)*24*60*60*1000; //星期四
var friday = now.getTime() - (currentWeek-5)*24*60*60*1000; //星期五
var saturday = now.getTime() - (currentWeek-6)*24*60*60*1000; //星期六
var sunday = now.getTime() + (7-currentWeek)*24*60*60*1000; //星期日
week=weektoday(monday,tuesday,wednesday,thursday,friday,saturday,sunday);
return week;
//获得上周的周一和周末
function getLastWeekDate()
var now = new Date();
var week=new Array();
var currentWeek = now.getDay();
if ( currentWeek == 0 )
currentWeek = 7;
var monday = now.getTime() - (currentWeek+6)*24*60*60*1000; //星期一
var tuesday = now.getTime() - (currentWeek+5)*24*60*60*1000; //星期二
var wednesday = now.getTime() - (currentWeek+4)*24*60*60*1000; //星期三
var thursday = now.getTime() - (currentWeek+3)*24*60*60*1000; //星期四
var friday = now.getTime() - (currentWeek+2)*24*60*60*1000; //星期五
var saturday = now.getTime() - (currentWeek+1)*24*60*60*1000; //星期六
var sunday = now.getTime() - (currentWeek)*24*60*60*1000; //星期日
week=weektoday(monday,tuesday,wednesday,thursday,friday,saturday,sunday);
return week;
//获得下周的周一至周末
function getNextWeekDate()
var now = new Date();
var week=new Array();
var currentWeek = now.getDay();
if ( currentWeek == 0 )
currentWeek = 7;
var monday = now.getTime() - (currentWeek-8)*24*60*60*1000; //星期一
var tuesday= now.getTime() - (currentWeek-9)*24*60*60*1000; //星期二
var wednesday = now.getTime() - (currentWeek-10)*24*60*60*1000; //星期三
var thursday = now.getTime() - (currentWeek-11)*24*60*60*1000; //星期四
var friday= now.getTime() - (currentWeek-12)*24*60*60*1000; //星期五
var saturday = now.getTime() - (currentWeek-13)*24*60*60*1000; //星期六
var sunday = now.getTime() - (currentWeek-14)*24*60*60*1000; //星期日
week=weektoday(monday,tuesday,wednesday,thursday,friday,saturday,sunday);
return week;
function weektoday(monday,tuesday,wednesday,thursday,friday,saturday,sunday) var days=new Array(); var monday1 = new Date(monday).toLocaleDateString();//星期一
var tuesday1= new Date(tuesday).toLocaleDateString(); //星期二
var wednesday1 = new Date(wednesday).toLocaleDateString(); //星期三
var thursday1 = new Date(thursday).toLocaleDateString(); //星期四
var friday1= new Date(friday).toLocaleDateString(); //星期五
var saturday1 =new Date(saturday).toLocaleDateString();//星期六
var sunday1 = new Date(sunday).toLocaleDateString();//星期日
var new_monday=changeTime(monday1);
var new_tuesday=changeTime(tuesday1);
var new_wednesday=changeTime(wednesday1);
var new_thursday=changeTime(thursday1);
var new_friday=changeTime(friday1);
var new_saturday=changeTime(saturday1);
var new_sunday=changeTime(sunday1); days[0]=new_monday;
days[1]=new_tuesday;
days[2]=new_wednesday;
days[3]=new_thursday;
days[4]=new_friday;
days[5]=new_saturday;
days[6]=new_sunday;
return days;//日期转换(2005年1月1日===>2005-1-01)
function changeTime(str)
var curYear = str.substring(0,str.indexOf('年'));
var curMonth =str.substring(str.indexOf('年')+1,str.indexOf('月'));
var curDay =str.substring(str.indexOf('月')+1,str.indexOf('日'));
if (curMonth<10)
curMonth="0"+curMonth;
if(curDay<10)
curDay="0"+curDay;
var returnDate = curYear+"-"+curMonth+"-"+curDay;
return returnDate;
</script>
<body>
<form name="form1">
<table>
<tr>
<td>星期一</td>
<td><input type="text" value="" name="monday"></td>
<td>星期二</td>
<td><input type="text" value="" name="tuesday"></td>
<td>星期三</td>
<td><input type="text" value="" name="wednesday"></td>
</tr>
<tr>
<td>星期四</td>
<td><input type="text" value="" name="thursday"></td>
<td>星期五</td>
<td><input type="text" value="" name="friday"></td>
<td>星期六</td>
<td><input type="text" value="" name="saturday"></td>
</tr>
<tr>
<td>星期日</td>
<td><input type="text" value="" name="sunday"></td>
</tr>
</table>
<table>
<tr>
<td><input type="button" value="本周" onClick="setWeekTime('this')"></td>
<td><input type="button" value="上周" onClick="setWeekTime('last')"></td>
<td><input type="button" value="下周" onClick="setWeekTime('next')"></td> </tr>
</table>
</form>
</body>
</html> 参考技术A function count(str)
var oDate = new Date(str.slice(0,4),str.slice(4,6)-1,str.slice(-2));
var oDay = oDate.getDay();
var oNum = oDate.getDate();
var bWeek1 = new Date(str.slice(0,4),str.slice(4,6)-1,oNum-oDay-7);
var bWeek2 = new Date(str.slice(0,4),str.slice(4,6)-1,oNum-oDay);
var aWeek1 = new Date(str.slice(0,4),str.slice(4,6)-1,oNum+8-oDay);
var aWeek2 = new Date(str.slice(0,4),str.slice(4,6)-1,oNum+8-oDay+6);
return '上一周':bWeek1.getDate()+'~'+bWeek2.getDate(),'下一周':aWeek1.getDate()+'~'+aWeek2.getDate();
alert(JSON.stringify(count('20150505'))); 参考技术B 现在网络上有很多的纯js开源框架，日历这个常用的更是 比如 Calendar.js 等等。。看看框架的api和demo，点击事件，相隔时间获取，年月日都实现了的。。 参考技术C QQ 给你
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