suchen

Heim  >  Artikel  >  Web-Frontend  >  JavaScript日期选择功能示例_javascript技巧

JavaScript日期选择功能示例_javascript技巧

PHP中文网
PHP中文网Original
2016-05-16 19:10:461087Durchsuche

这篇文章主要介绍了JavaScript日期选择功能,结合实例形式分析了javascript日期与时间相关操作技巧,需要的朋友可以参考下

本文实例讲述了JavaScript日期选择功能。分享给大家供大家参考，具体如下：

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <meta charset="utf-8">
  <title>javascript日期选择</title>
  <style type="text/css">
    option{
      width:150px;
    }
  </style>
</head>
<body>
<!--<input type="hidden" value="window.location.href" />-->
<br />
<p id="dateOp">
  <select id="selectYear" onchange="getDay()"></select>年
  <select id="selectMonth" onchange="getDay()"></select>月
  <select id="selectDay"></select>日
  <input type="button" value="getdate" />
</p>
<script type="text/javascript">
  //或得当前年月日
  var date = new Date();
  var year = date.getFullYear();
  var month = date.getMonth() + 1;
  var day = date.getDate();
  var startYear = 2000;
  var endYear = 2050;
  var button = document.getElementsByTagName("input")[0];
  //得到三个select项
  var selectYearElement = document.getElementById("selectYear");
  var selectMonthElement = document.getElementById("selectMonth");
  var selectDayElement = document.getElementById("selectDay");
  //selectYearElement.onchange = getDay();
  //selectMonthElement.onchange = getDay();
  //selectYearElement.addEventListener
  getYear();
  getMonth();
  getDay();
  //年份函数
  function getYear() {
    for (var i = startYear; i <= endYear; i++) {
      var opYearElement = document.createElement("option");
      var textElement = document.createTextNode(i);
      opYearElement.appendChild(textElement);
      opYearElement.value = i;
      selectYearElement.appendChild(opYearElement);
    }
//设置默认年份的值
    selectYearElement.selectedIndex = year - startYear;
  }
  //月份函数
  function getMonth() {
    for (var i = 1; i <= 12; i++) {
      var opMonthElement = document.createElement("option");
      textMonth = document.createTextNode(i);
      opMonthElement.appendChild(textMonth);
      opMonthElement.value = i;
      selectMonthElement.appendChild(opMonthElement);
    }
//设置默认年份的值
    selectMonthElement.selectedIndex = month - 1;
  }
  //日期函数
  function getDay() {
    var getSelectedYear = selectYearElement.selectedIndex + startYear;
    var getSelectedMonth = selectMonthElement.selectedIndex + 1;
    var flag = 0;
    var selectDayElement = document.getElementById("selectDay");
    if (selectDayElement.hasChildNodes()) {
      var optionElements = selectDayElement.getElementsByTagName("option");
      for (var i = 0; i < optionElements.length; i++) {
        selectDayElement.removeChild(optionElements[0]);
//不知道为什么必须得自减一
        i--;
      }
    }
    else {
    }
//得到闰年
    if ((getSelectedYear % 4 == 0 && getSelectedYear % 100 != 0) || getSelectedYear % 400 == 0) {//得到闰年的年号
//alert("闰年");
//得到闰年大月份除二月以外
      if ((getSelectedMonth <= 7 && getSelectedMonth % 2 == 1 && getSelectedMonth != 2) || (getSelectedMonth >= 8 && getSelectedMonth % 2 == 0)) {//得到大月
        setDay(flag = 31);
      }
      else if (getSelectedMonth <= 7 && getSelectedMonth == 2) {
        setDay(flag = 29);
      }
      else if ((getSelectedMonth <= 7 && getSelectedMonth % 2 == 0 && getSelectedMonth != 2) || (getSelectedMonth >= 8 && getSelectedMonth % 2 == 1)) {//得到小月份除二月以外
        setDay(flag = 30);
      }
    }
//非闰年
    else {
//alert("平年");
//得到平年大月份除二月以外
      if ((getSelectedMonth <= 7 && getSelectedMonth % 2 == 1 && getSelectedMonth != 2) || (getSelectedMonth >= 8 && getSelectedMonth % 2 == 0)) {//得到大月
        setDay(flag = 31);
      }
      else if (getSelectedMonth <= 7 && getSelectedMonth == 2) {
        setDay(flag = 28);
      }
      else if ((getSelectedMonth <= 7 && getSelectedMonth % 2 == 0 && getSelectedMonth != 2) || (getSelectedMonth >= 8 && getSelectedMonth % 2 == 1)) {//得到小月份除二月以外
        setDay(flag = 30);
      }
    }
  }
  //设置默认年份的值
  selectDayElement.selectedIndex = day - 1;
  function setDay(dayLength) {
    for (var i = 1; i <= dayLength; i++) {
      var opDayElement = document.createElement("option");
      textMonth = document.createTextNode(i);
      opDayElement.appendChild(textMonth);
      opDayElement.value = i;
//alert(i);
      selectDayElement.appendChild(opDayElement);
    }
  }
  button.onclick = function () {
    var getSelectedYear = selectYearElement.selectedIndex + startYear;
    var getSelectedMonth = selectMonthElement.selectedIndex + 1;
    var getSelectedDay = selectDayElement.selectedIndex + 1;
    alert("当前选中的日期是：" + getSelectedYear + "年" + getSelectedMonth + "月" + getSelectedDay + "日")
  }
  //getDay
</script>
</body>
</html>

运行效果图如下：

Stellungnahme：
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Vorheriger Artikel：document.createElement("A")比较不错的属性_javascript技巧Nächster Artikel：用javascript实现兼容IE7的类库 IE7_0_9.zip提供下载_javascript技巧

In Verbindung stehende Artikel

Mehr sehen