<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 /> <div> <select onchange="getDay()"></select>年 <select onchange="getDay()"></select>月 <select></select>日 <input type="button" value="getdate" /> </div> <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：
PS：这里再为大家提供几款日期与日历相关在线工具供大家参考使用：