本篇文章主要介紹了js出生日期 年月日級聯菜單的示例代碼。需要的朋友可以過來參考下,希望對大家有所幫助
現在世界通用的公歷(陽歷)也經過一個長期演變的過程。我們先看,公歷每個月的日數是固定的:"七前單大,八後雙大"。也就是說,一、三、五、七、八、十、臘月(十二月)是31天,四、六、九、十一月是30天,只有二月,平年28天,閏年29天。 代碼如下: <%@ 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="">選擇 年</option> </select> <select name=MM id="MM" onchange="MMDD(this.value)"> <option value="">選擇 月</option> </select> <select name=DD id="DD"> <option value="">選擇 日</option> </select> </div> <asp:HiddenField ID="hfValue" runat="server" /> <asp:Button ID="btnSave" runat="server" Text="保存" 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]; //先給年下拉框賦內容 var y = new Date().getFullYear(); var str = strYYYY.substring(0, strYYYY.length - 9); for (var i = (y - 80); i < (y + 2); i++) //以今年為准,前30年,後30年 { str += "<option value='" + i + "'> " + i + " 年" + "</option>rn"; } document.form1.YYYY.outerHTML = str + "</select>"; //賦月份的下拉框 var str = strMM.substring(0, strMM.length - 9); for (var i = 1; i < 13; i++) { str += "<option value='" + i + "'> " + i + " 月" + "</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); //賦日期下拉框 document.form1.DD.value = new Date().getDate(); } function YYYYMM(str) //年發生變化時日期發生變化(主要是判斷閏平年) { 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) //月發生變化時日期聯動 { 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) //據條件寫日期的下拉框 { var s = strDD.substring(0, strDD.length - 9); for (var i = 1; i < (n + 1); i++) s += "<option value='" + i + "'> " + i + " 日" + "</option>rn"; document.form1.DD.outerHTML = s + "</select>"; } function IsPinYear(year) //判斷是否閏平年 { return (0 == year % 4 && (year % 100 != 0 || year % 400 == 0)) } //--> </script> .aspx.cs 代碼如下: 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); } } }