js出生日期年月日级联菜单示例代码_javascript技巧

function getValue() {
var year = document.getElementById("YYYY").options[document.getElementById("YYYY").selectedIndex].value;
var month = document.getElementById("MM").options[document.getElementById("MM").selectedIndex].value;
var day = document.getElementById("DD").options[document.getElementById("DD").selectedIndex].value;
document.getElementById("hfValue").value = year+"-"+month+"-"+day;
}

window.onload=function() {
strYYYY = document.form1.YYYY.outerHTML;

strMM = document.form1.MM.outerHTML;
strDD = document.form1.DD.outerHTML;
MonHead = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
//先给年下拉框赋内容
var y = new Date().getFullYear();
var str = strYYYY.substring(0, strYYYY.length - 9);

for (var i = (y - 80); i < (y + 2); i++) //以今年为准，前30年，后30年
{
str += " " + i + " 年" + "\r\n";
}
document.form1.YYYY.outerHTML = str + "";
//赋月份的下拉框
var str = strMM.substring(0, strMM.length - 9);
for (var i = 1; i < 13; i++) {
str += " " + i + " 月" + "\r\n";
}
document.form1.MM.outerHTML = str + "";
document.form1.YYYY.value = y;
document.form1.MM.value = new Date().getMonth() + 1;
var n = MonHead[new Date().getMonth()];
if (new Date().getMonth() == 1 && IsPinYear(YYYYvalue)) n++;
writeDay(n); //赋日期下拉框
document.form1.DD.value = new Date().getDate();
}
function YYYYMM(str) //年发生变化时日期发生变化(主要是判断闰平年)
{
var MMvalue = document.form1.MM.options[document.form1.MM.selectedIndex].value;
if (MMvalue == "") {
DD.outerHTML = strDD;
return;
}
var n = MonHead[MMvalue - 1];
if (MMvalue == 2 && IsPinYear(str)) n++;
writeDay(n)
}
function MMDD(str) //月发生变化时日期联动
{
var YYYYvalue = document.form1.YYYY.options[document.form1.YYYY.selectedIndex].value;
if (str == "") {
DD.outerHTML = strDD;
return;
}
var n = MonHead[str - 1];
if (str == 2 && IsPinYear(YYYYvalue)) n++;
writeDay(n)
}
function writeDay(n) //据条件写日期的下拉框
{
var s = strDD.substring(0, strDD.length - 9);
for (var i = 1; i < (n + 1); i++) s += " " + i + " 日" +

"\r\n";
document.form1.DD.outerHTML = s + "";

}
function IsPinYear(year) //判断是否闰平年
{
return (0 == year % 4 && (year % 100 != 0 || year % 400 == 0))
}
//-->


.aspx.cs
代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
btnSave.Attributes.Add("onclick", "getValue()");
}

protected void btnSave_Click(object sender, EventArgs e)
{
Response.Write(hfValue.Value);
}
}
}