JS显示上一周

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
复制提示

<html>
<head>
<script>
var currDT;
var aryDay = new Array("日","一","二","三","四","五","六");//显示星期
var lastDay;//页面显示的最后一天
var firstDay;//页面显示的第一天

Date.prototype.format = function (format) {
var o = {
"M+": this.getMonth() + 1, //month
"d+": this.getDate(), //day
"h+": this.getHours(), //hour
"m+": this.getMinutes(), //minute
"s+": this.getSeconds(), //second
"q+": Math.floor((this.getMonth() + 3) / 3), //quarter
"S": this.getMilliseconds() //millisecond
}
if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
(this.getFullYear() + "").substr(4 - RegExp.$1.length));
for (var k in o) if (new RegExp("(" + k + ")").test(format))
format = format.replace(RegExp.$1,
RegExp.$1.length == 1 ? o[k] :
("00" + o[k]).substr(("" + o[k]).length));
return format;
}

//初始化日期加载
function initDate() {
currDT = new Date();
showdate.innerHTML = currDT.toLocaleDateString(); //显示日期
var dw = currDT.getDay();//从Date对象返回一周中的某一天(0~6)
var tdDT;//日期 //在表格中显示一周的日期
var objTB = document.getElementById("mytable");//取得表格对象
for(var i=0;i<7;i++) {
tdDT = getDays()[i];
if(tdDT.toLocaleDateString() == currDT.toLocaleDateString()) {
objTB.rows[0].cells[i].style.color = "red";//currDT突出显示
}
dw = tdDT.getDay();//星期几
objTB.rows[0].cells[i].innerHTML = tdDT.getMonth()+1 + "月" + tdDT.getDate() + "日星期" + aryDay[dw];//显示
}
//重新赋值
lastDay = getDays()[6];//本周的最后一天
firstDay = getDays()[0];//本周的第一天
}//取得当前日期一周内的某一天
function getWeek(i) {
var now = new Date();
var n = now.getDay();
var start = new Date();
start.setDate(now.getDate() - n + i);//取得一周内的第一天、第二天、第三天...
return start;
}//取得当前日期一周内的七天
function getDays() {
var days = new Array();
for(var i=1;i<=7;i++) {
days[i-1] = getWeek(i);
}
return days;
}//取得下一周的日期数(共七天)
function getNextWeekDatas(ndt) {
var days = new Array();
for(var i=1;i<=7;i++) {
var dt = new Date(ndt);
days[i-1] = getNextWeek(dt,i);
}
return days;
}//指定日期的下一周(后七天)
function getNextWeek(dt,i) {
var today = dt;
today.setDate(today.getDate()+i);
return today;
}//取得上一周的日期数(共七天)
function getPreviousWeekDatas(ndt) {
var days = new Array();
for(var i=-7;i<=-1;i++) {
var dt = new Date(ndt);
days[7+i] = getPreviousWeek(dt,i);
}
return days;
}//指定日期的上一周(前七天)
function getPreviousWeek(dt,i) {
var today = dt;
today.setDate(today.getDate()+i);
return today;
}//下一周
function nextWeek() {
setCurrDTAfter();//重设时间
showdate.innerHTML = currDT.toLocaleDateString(); //显示日期 //在表格中显示一周的日期
var objTB = document.getElementById("mytable");//取得表格对象
var dw = currDT.getDay();//从Date对象返回一周中的某一天(0~6)
var tdDT;//日期for(var i=0;i<7;i++) {
tdDT = getNextWeekDatas(lastDay)[i];
if(tdDT.toLocaleDateString()==currDT.toLocaleDateString()) {
objTB.rows[0].cells[i].style.color = "red";//currDT突出显示
}
dw = tdDT.getDay();//星期几
objTB.rows[0].cells[i].innerHTML = tdDT.getMonth()+1 + "月" + tdDT.getDate() + "日星期" + aryDay[dw]; //显示
}
//重新赋值
firstDay = getNextWeekDatas(lastDay)[0];//注意赋值顺序1
lastDay = getNextWeekDatas(lastDay)[6];//注意赋值顺序2
}//上一周
function previousWeek() {
settCurrDTBefore();
showdate.innerHTML = currDT.toLocaleDateString(); //显示日期 //在表格中显示一周的日期
var objTB = document.getElementById("mytable");//取得表格对象
var dw = currDT.getDay();//从Date对象返回一周中的某一天(0~6)
var tdDT;//日期for(var i=0;i<7;i++) {
tdDT = getPreviousWeekDatas(firstDay)[i];if(tdDT.toLocaleDateString()==currDT.toLocaleDateString()) {
objTB.rows[0].cells[i].style.color = "red";//currDT突出显示
}
dw = tdDT.getDay();//星期几
objTB.rows[0].cells[i].innerHTML = tdDT.getMonth()+1 + "月" + tdDT.getDate() + "日星期" + aryDay[dw];//显示
}
//重新赋值
lastDay = getPreviousWeekDatas(firstDay)[6];//注意赋值顺序1
firstDay = getPreviousWeekDatas(firstDay)[0];//注意赋值顺序2
}//当前日期后第七天
function setCurrDTAfter() {
currDT.setDate(currDT.getDate()+7);
}//当前日期前第七天
function settCurrDTBefore() {
currDT.setDate(currDT.getDate()-7);
}
</script>
</head>
<body onload="initDate()">
<table align="center">
<tr>
<td>
<input type="button" name="previousweek" value="上一周" onclick="previousWeek();"/>
<span id="showdate"></span>
<input type="button" name="previousweek" value="下一周" onclick="nextWeek();"/>
</td>
</tr>
</table>

<table id="mytable" cellspacing="0" border=="1" align="center" width="90%">
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>
</body>
</html>