Js birth date year month day cascading menu sample code
- 2020-03-30 01:16:34
- OfStack
The world's current Gregorian calendar has also undergone a long - term evolution. Let's see first, the Gregorian calendar month is fixed number of days: "seven single big, eight after double big." That is, one, three, five, seven, eight, ten, and twelve months (December) have thirty-one days. Four, six, nine, and November have thirty.
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<select name=YYYY id="YYYY" onchange="YYYYMM(this.value)">
<option value=""> choose years </option>
</select>
<select name=MM id="MM" onchange="MMDD(this.value)">
<option value=""> choose month </option>
</select>
<select name=DD id="DD">
<option value=""> choose day </option>
</select>
</div>
<asp:HiddenField ID="hfValue" runat="server" />
<asp:Button ID="btnSave" runat="server" Text=" save " onclick="btnSave_Click" />
</form>
</body>
</html>
<script language="JavaScript">
<!--
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];
//First give the contents of the year drop - down box
var y = new Date().getFullYear();
var str = strYYYY.substring(0, strYYYY.length - 9);
for (var i = (y - 80); i < (y + 2); i++) //This year shall prevail, the first 30 years and the last 30 years
{
str += "<option value='" + i + "'> " + i + " years " + "</option>rn";
}
document.form1.YYYY.outerHTML = str + "</select>";
//The drop-down box for the assigned month
var str = strMM.substring(0, strMM.length - 9);
for (var i = 1; i < 13; i++) {
str += "<option value='" + i + "'> " + i + " month " + "</option>rn";
}
document.form1.MM.outerHTML = str + "</select>";
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); //Assign date drop-down box
document.form1.DD.value = new Date().getDate();
}
function YYYYMM(str) //When the year changes, the date changes (mainly to judge the run-flat year)
{
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) //Date linkage when month changes
{
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) //A drop-down box that conditionally writes the date
{
var s = strDD.substring(0, strDD.length - 9);
for (var i = 1; i < (n + 1); i++) s += "<option value='" + i + "'> " + i + " day " +
"</option>rn";
document.form1.DD.outerHTML = s + "</select>";
}
function IsPinYear(year) //Judge whether a leap year
{
return (0 == year % 4 && (year % 100 != 0 || year % 400 == 0))
}
//-->
</script>
.aspx. Cs
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);
}
}
}