＜%@ Control Language="C#" ClassName="Calendar" %＞

＜script type="text/javascript"＞
＜!--
/*                              //
//      @Written By popduke@    //
//                              */
/*使用说明：
//1.此控件必须放在runat=server的form里面，如果form的ID有变化，请将控件的FormID属性设置为该ID的值。  //
//2.时间跨度为1950-2049，有需求的同志可以修改年度限制Line73 and Line121。                            //
//3.服务器端调用Date即为显示的日期，客户端？要客户端你用这个干嘛？                                   */
//--＞
＜/script＞

＜script runat="server"＞
    protected string strFormID = "form1";
    protected void Page_Load(object sender， EventArgs e)
    {
        if (!IsPostBack)
            hfDate.Value = DateTime.Now.ToShortDateString();
    }
    public DateTime Date
    {
        get { return DateTime.Parse(hfDate.Value); }
    }

    public string FormID
    {
        get { return strFormID; }
        set { strFormID = (value == "") ? "form1" : value; }
    }
＜/script＞
＜center＞
＜table border="-1" style="height: 19px;"＞
＜tr＞
＜td＞
＜input id="txtYear" maxlength="4" onchange="return txtYear_change()" onkeydown="return txtYear_keydown()"
    style="width: 31px; border-top-style: none; border-right-style: none; border-left-style: none;
    height: 17px; border-bottom-style: none;" type="text" /＞-
＜input id="txtMonth" maxlength="2" onchange="return txtMonth_change()" onkeydown="return txtMonth_keydown()"
    style="width: 15px; border-top-style: none; border-right-style: none; border-left-style: none;
    height: 17px; border-bottom-style: none;" type="text" /＞-
＜input id="txtDate" maxlength="2" onchange="return txtDate_change()" onkeydown="return txtDate_keydown()"
    style="width: 15px; border-top-style: none; border-right-style: none; border-left-style: none;
    height: 17px; border-bottom-style: none;" type="text" /＞
＜/td＞
＜/tr＞
＜/table＞
＜asp:HiddenField ID="hfDate" runat="server" /＞
＜/center＞
＜script type="text/javascript"＞
var frmParent = ＜%=strFormID %＞;
var arrStr = frmParent.＜%=hfDate.ClientID %＞.value.split("-");
frmParent.txtYear.value = arrStr[0];
frmParent.txtMonth.value = StringFormat(arrStr[1]);
frmParent.txtDate.value = StringFormat(arrStr[2]);
var iYear = parseInt(frmParent.txtYear.value，10);
var iMonth = parseInt(frmParent.txtMonth.value，10);
var iDate = parseInt(frmParent.txtDate.value，10);
ChangeServerValue();

function txtYear_keydown()
{
    iYear = parseInt(frmParent.txtYear.value，10);
    if(event.keyCode == 40)
        iYear++;
    else if(event.keyCode == 38)
        iYear--;
    else if((event.keyCode == 9)||(event.keyCode == 8)||(isnumber(event.keyCode)))
        return true;
    else
        return false;
    if(iYear ＜ 1950) iYear = 1950;
    if(iYear ＞ 2049) iYear = 2049;
    frmParent.txtYear.value = iYear;
    ChangeDate();
    ChangeServerValue();
    return true;
}

function txtMonth_keydown()
{
    iMonth = parseInt(frmParent.txtMonth.value，10);
    if(event.keyCode == 40)
        iMonth++;
    else if(event.keyCode == 38)
        iMonth--;
    else if((event.keyCode == 9)||(event.keyCode == 8)||(isnumber(event.keyCode)))
        return true;
    else
        return false;
    if(iMonth ＜ 1) iMonth = 1;
    if(iMonth ＞ 12) iMonth = 12;
    frmParent.txtMonth.value = StringFormat(iMonth);
    ChangeDate();
    ChangeServerValue();
    return true;
}

function txtDate_keydown()
{
    iDate = parseInt(frmParent.txtDate.value，10);
    if(event.keyCode == 40)
        iDate++;
    else if(event.keyCode == 38)
        iDate--;
    else if((event.keyCode == 9)||(event.keyCode == 8)||(isnumber(event.keyCode)))
        return true;
    else
        return false;
    if(iDate ＜ 1) iDate++;
    if(iDate ＞ getMonthMaxDays(iYear，iMonth)) iDate = getMonthMaxDays(iYear，iMonth);
    frmParent.txtDate.value = StringFormat(iDate);
    ChangeServerValue();
    return true;
}

function txtYear_change()
{
    iYear = parseInt(frmParent.txtYear.value，10);
    if(iYear ＜ 1950) iYear = 1950;
    if(iYear ＞ 2049) iYear = 2049;
    frmParent.txtYear.value = iYear;
    if(getMonthMaxDays(iYear，iMonth) ＜ iDate)
    ChangeDate();
    ChangeServerValue();
}

function txtMonth_change()
{
    iMonth = parseInt(frmParent.txtMonth.value，10);
    if(iMonth ＜ 1) iMonth = 1;
    if(iMonth ＞ 12) iMonth = 12;
    frmParent.txtMonth.value = StringFormat(iMonth);
    ChangeDate();
    ChangeServerValue();
}

function txtDate_change()
{
    iDate = parseInt(frmParent.txtDate.value，10);
    if(iDate ＜ 1) iDate++;
    if(iDate ＞ getMonthMaxDays(iYear，iMonth)) iDate = getMonthMaxDays(iYear，iMonth);
    frmParent.txtDate.value = StringFormat(iDate);
    ChangeServerValue();
}

function ChangeDate()
{
    if(getMonthMaxDays(iYear，iMonth) ＜ iDate)
    {
        frmParent.txtDate.value = getMonthMaxDays(iYear，iMonth);
        iDate = getMonthMaxDays(iYear，iMonth);
    }
}

function ChangeServerValue()
{
    frmParent.＜%=hfDate.ClientID %＞.value = iYear + "-" + iMonth + "-" + iDate;
}

function isLeapYear(iYear) {
    return (iYear%100==0) ? (iYear%400==0) : (iYear%4==0);
}

function getMonthMaxDays(iYear，iMonth) {
    var mday=new Array(31，28，31，30，31，30，31，31，30，31，30，31);
    if (isLeapYear(iYear)) mday[1]++;
    return mday[iMonth - 1];
}

function StringFormat(Number)
{
    return (Number ＜ 10) ? ("0" + Number) : Number;
}

function isnumber(keycode) {
    return ((keycode ＞= 48 && keycode ＜= 57) || (keycode ＞= 96 && keycode ＜= 105));
}
＜/script＞