现在世界通用的公历(阳历)也经过一个长期演变的过程。我
代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www./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="">选择 年</option> </select> <select name=MM id="MM" onchange="MMDD(this.value)"> <option value="">选择 月</option> </select> <select name=DD id="DD"> <option value="">选择 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 += "<option value='" + i + "'> " + i + " 年" + "</option>\r\n"; } document.form1.YYYY.outerHTML = str + "</select>"; //赋月份的下拉框 var str = strMM.substring(0, strMM.length - 9); for (var i = 1; i < 13; i++) { str += "<option value='" + i + "'> " + i + " 月" + "</option>\r\n"; } 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); //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 += "<option value='" + i + "'> " + i + " 日" + "</option>\r\n"; document.form1.DD.outerHTML = s + "</select>"; } function IsPinYear(year) //判断是否闰平年 { return (0 == year % 4 && (year % 100 != 0 || year % 400 == 0)) } //--> </script> |
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