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index.html
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>日期计算器</title>
<meta name="description" content="时间小工具：计算两个日期之间相差多少天、相差几周、相差几个月；计算某日往后或者往前若干天、若干星期、若干月的日期。还提供其他一些日期推算工具。">
<style>
body {
background: #e7e7e7;
margin: 0;
}
body,
table,
div {
font-size: 1.3rem;
line-height: 2.0rem;
}
table {
border-collapse: collapse;
cursor: default;
}
input,
select {
height: 2.5rem;
font-size: 1.25rem;
}
.y {
width: 7rem;
}
.d {
width: 4rem;
}
</style>
</head>
<body>
<br>
<center>
<b>日期计算器</b>
<div>
<br>
<br>
<script type="text/javascript" src="base.js"></script>
<script>
function dayadd() {
var sy = parseInt($("SY").value);
var sm = parseInt($("SM").value) - 1;
var sd = parseInt($("SD").value);
var day0 = new Date(sy, sm, sd);
if (day0 == "Invalid Date") {
alert("请输入正确日期");
return;
}
var dnum = parseInt($("dnum").value) * $("pom").value;
var dtype = $("dtype").value;
if (dtype == 1) {
day1 = new Date(sy, sm, sd + dnum);
}
if (dtype == 2) {
day1 = new Date(sy, sm, sd + dnum * 7);
}
else if (dtype == 3) {
day1 = new Date(sy, sm + dnum, sd);
}
$("result1").innerHTML = getdatestring(day1)
localStorage.setItem("dayadd", $("dnum").value + "," + $("dtype").value + "," + $("pom").value);
// LoadJs("s2l.php?c=" + Math.ceil(day1 / 86400000));
}
// function s2l(ly, lm, ld) {
// $("nongli").innerHTML = ly != undefined ? getlinfo(ly, lm, ld) : "";
// }
function daydiff() {
var y2 = parseInt($("SY2").value);
var m2 = parseInt($("SM2").value);
var d2 = parseInt($("SD2").value);
var y3 = parseInt($("SY3").value);
var m3 = parseInt($("SM3").value);
var d3 = parseInt($("SD3").value);
localStorage.setItem("diffc", y3 + "-" + m3 + "-" + d3);
var day2 = new Date(y2, m2 - 1, d2);
var day3 = new Date(y3, m3 - 1, d3);
var dnum = (day3 - day2) / 86400000;
var minfo = "";
if (dnum > 0) {
var mnum;
var mleft;
mnum = (y3 - y2) * 12 + (m3 - m2);
if (d3 >= d2) {
mleft = d3 - d2;
}
else {
mnum--;
mleft = (day3 - new Date(y3, m3 - 2, d2)) / 86400000;
}
minfo = " = " + Math.floor(dnum / 7) + "星期" + dnum % 7 + "天" + " = " + mnum + "个月" + mleft + "天";
}
$("result2").innerHTML = dnum + "天" + minfo;
}
function setday(ty, tm, td) {
$("SY").value = ty;
$("SM").value = tm;
$("SD").value = td;
$("SY2").value = ty;
$("SM2").value = tm;
$("SD2").value = td;
var temp = localStorage.getItem("diffc");
if (temp != null) {
var ss = temp.split('-');
$("SY3").value = ss[0];
$("SM3").value = ss[1];
$("SD3").value = ss[2];
}
else {
$("SY3").value = ty + 1;
$("SM3").value = 1;
$("SD3").value = 1;
}
temp = localStorage.getItem("dayadd");
if (temp != null) {
var ss = temp.split(',');
$("dnum").value = ss[0];
$("dtype").value = ss[1];
$("pom").value = ss[2];
}
else {
$("dnum").value = 100;
}
}
function set_today(){
var d=new Date();
$("SY3").value=d.getFullYear();
$("SM3").value=d.getMonth()+1;
$("SD3").value=d.getDate();
}
</script>
<b>一、计算两个日期之间差多少天</b>
<table>
<tbody>
<tr>
<td>
</td>
<td>
<input type="number" class="y" id="SY2" value="2020">年
<input type="number" class="d" id="SM2" value="10">月
<input type="number" class="d" id="SD2" value="1">日
</td>
</tr>
<tr>
<td width="1em" valign="top">
距
</td>
<td><input type="number" class="y" id="SY3" value="2022">年
<input type="number" class="d" id="SM3" value="1">月
<input type="number" class="d" id="SD3" value="1">日
</td>
</tr>
<tr>
<td>
</td>
<td>
<input type="button" value=" 相 差 " onclick="daydiff()">
<span id="result2"></span>
</td>
</tr>
</tbody>
</table>
<br>
<br>
<b>二、推算几天后的日期</b>
<table>
<tbody>
<tr>
<td>
</td>
<td>
<input type="number" class="y" id="SY" name="SY" value="2020">年
<input type="number" class="d" id="SM" name="SM" value="10">月
<input type="number" class="d" id="SD" name="SD" value="1">日
</td>
</tr>
<tr>
<td width="1em">
</td>
<td>
<select id="pom">
<option value="1" selected="selected">往后</option>
<option value="-1">往前</option>
</select>
<input type="number" class="y" id="dnum" value="700">
<select id="dtype">
<option value="1" selected="selected">天</option>
<option value="2">星期</option>
<option value="3">月</option>
</select>
</td>
</tr>
<tr>
<td>
</td>
<td>
<input type="button" value=" 是 " onclick="dayadd()">
<span id="result1"></span>
<span id="nongli"></span>
</td>
</tr>
</tbody>
</table>
</div>
</center>
<br>
<br>
<script>
set_today()
daydiff()
dayadd()
</script>
</body>
</html>