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一个纯脚本写的日期控件

作者：未知来源：月光软件站 加入时间：2005-2-28　月光软件站

使用的是一个img作为按钮，一个iframe载入日期页面
<IMG id="ImgDate" style="LEFT: 137px; CURSOR: hand; POSITION: absolute; TOP: 1px" onclick="SetlstDate1Visible('TxtDate')" src="images/ImgBtn/frmMainDate.gif" width="21">

<IFRAME class="dtpMonth1" id="lstDate1" style="DISPLAY: none; Z-INDEX: 105; LEFT: 112px; WIDTH: 176px; POSITION: absolute; TOP: 152px; HEIGHT: 160px"
   tabIndex="-1" name="lstDate1" src="frmDate.aspx" frameBorder="0" scrolling="no">
  </IFRAME>

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="frmDate.aspx.vb" Inherits="MOST_WEB.frmDate"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
  <title>dtpDate1</title>
  <meta http-equiv="Content-Type" content="text/html; charset=shift_jis">
  <meta content="Microsoft Visual Studio .NET 7.0" name="GENERATOR">
  <meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
  <meta content="JavaScript" name="vs_defaultClientScript">
  <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
  <LINK href="Styles.css" type="text/css" rel="stylesheet">
  <script language="javascript" src="comFuncs.js"></script>
  <script language="JavaScript">
   function RunNian(The_Year)//取得是否為潤年
   {
    if ((The_Year%400==0) || ((The_Year%4==0) && (The_Year%100!=0)))
     return true;
    else
     return false;
   }

   function GetWeekday(The_Year,The_Month)
   {

    var Allday;
    Allday = 0;
    if (The_Year>2000)
    {
     for (i=2000 ;i<The_Year; i++) //計算從2000年開始到今年的天數
     {
      if (RunNian(i)){
       Allday += 366;
      }else{
       Allday += 365;
      }
     }

     for (i=2; i<=The_Month; i++)
     {
      switch (i)
      {
       case 2 : Allday += 31; break;
       case 3 :
         if (RunNian(The_Year)){
          Allday += 29;
         }else{
          Allday += 28;
         }
         break;
       case 4 : Allday += 31; break;
       case 5 : Allday += 30; break;
       case 6 : Allday += 31; break;
       case 7 : Allday += 30; break;
       case 8 : Allday += 31; break;
       case 9 : Allday += 31; break;
       case 10 : Allday += 30; break;
       case 11 : Allday += 31; break;
       case 12 : Allday += 30; break;
      }
     }
    }
    return (Allday+6)%7;
   }

   function chooseday(objName,The_Year,The_Month,The_Day)
   {
    var Firstday;
    Firstday = GetWeekday(The_Year,The_Month);//取得星期幾
    ShowCalender(objName,The_Year,The_Month,The_Day);
   }

   function showdate(objName,The_Year,The_Month,The_Day){//顯示日期，將所選的日期傳到textbox中顯示出來
    var txtDate;
    objName="TxtDate";
    txtDate= objName;

    var completely_date;
    var cur_Month
    var cur_Day
    if (The_Month.toString().length==1){//給月前面加0
     cur_Month="0"+The_Month
    }else{
     cur_Month=The_Month
    }
    if (The_Day.toString().length==1){//給日期前加0
     cur_Day="0"+The_Day
    }else{
     cur_Day=The_Day
    }
    if (The_Day!=0)//調整日期的樣式
     completely_date = The_Year + "/" + cur_Month + "/" + cur_Day;
    else
     completely_date = "No Choose";

    parent.document.all(txtDate).innerText = completely_date;//顯示給textbox
   }

   function nextmonth(objName,The_Year,The_Month,The_Day)//選擇下個月
   {
    if (The_Month==12)
     chooseday(objName,The_Year+1,1,The_Day);
    else
     chooseday(objName,The_Year,The_Month+1,The_Day);
   }

     if ((The_Year==today.getYear()) && (The_Month==today.getMonth()+1) && (i==today.getDate())){
      showstr += "<td align=center class=" + bgColor + " style='CURSOR: hand;BACKGROUND-POSITION: center center;BACKGROUND-REPEAT: no-repeat;BACKGROUND-IMAGE: url(./Images/imgbtn/date.gif);' onclick=chooseday('" + objName + "'," + The_Year + "," + The_Month + "," + i + ")>" + i ;
     }else{
      showstr += "<td align=center class=" + bgColor + " style='cursor:hand' onclick=chooseday('" + objName + "'," + The_Year + "," + The_Month + "," + i + ")>" + i ;
     }
     showstr += "</td>";

     Firstday = (Firstday + 1)%7;
     if ((Firstday==0) && (i!=Month_Day)) {
      showstr += "</tr><tr>";
      k=k+1;
     }
    }

    if (Firstday!=0) //Firstday傳過來的當前月第一天是星期幾
    {
     for (i=Firstday; i<7; i++)
     showstr += "<td align=center class=day> </td>";
     showstr += "</tr>";
    }
    showstr += "</tr><tr>"
    if (k==5){
     showstr += "<td colspan=7 class=day>&nbsp</td></tr><tr>";
    }

    var curMonth;
    var curDay;
    if ((today.getMonth()+1).toString().length==1){
     curMonth="0"+(today.getMonth()+1);
    }else{
     curMonth=(today.getMonth()+1);
    }
    if (today.getDate().toString().length==1){
     curDay="0"+today.getDate();
    }else{
     curDay=today.getDate();
    }
    showstr +="<td class='title4' colspan=2><img src='./Images/imgbtn/date.gif'></td><td align=left colspan=5 class='title4' style='CURSOR: hand;' onclick=getDtpDate('');>&nbsp 今日:"+today.getYear()+"/"+curMonth+"/"+curDay+"</td>"
    showstr += "</tr></table></td></tr></table>";
    document.all(objName).innerHTML= showstr;
    showdate("txtFrom",The_Year,The_Month,The_Day)
   }

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