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Javascript 中的 JavaScript 实现日历式日期选择

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-08-10   浏览: 142 ::
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Canlender--JavaScript</title>
<style>
td {
 font-family: Arial, Helvetica, sans-serif;
 font-size: 12px;
}

</style>

</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="180">
<tr><td id=cc>
</td></tr></table>
</body>
<script language="JavaScript">
function RunNian(The_Year)
{
 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++) 
   if (RunNian(i))
    Allday += 366;
   else
    Allday += 365;
  for (i=2; i<=The_Month; i++)
  {
   switch (i)
   {
    case 2 :
     if (RunNian(The_Year))
      Allday += 29;
     else
      Allday += 28;
     break;
    case 3 : Allday += 31; break;
    case 4 : Allday += 30; break;
    case 5 : Allday += 31; break;
    case 6 : Allday += 30; break;
    case 7 : Allday += 31; break;
    case 8 : Allday += 31; break;
    case 9 : Allday += 30; break;
    case 10 : Allday += 31; break;
    case 11 : Allday += 30; break;
    case 12 :  Allday += 31; break;
    
   }
   
  }
 }
 
 return (Allday+6)%7;
 

}

function chooseday(The_Year,The_Month,The_Day)
{
 var Firstday;
 var completely_date;
 if (The_Day!=0)
  completely_date = The_Year + "-" + The_Month + "-" + The_Day;
 else
  completely_date = "No Choose";
 //showdate 只是一个为了显示而采用的东西，
 //如果外部想引用这里的时间，可以通过使用 completely_date引用完整日期
 //也可以通过The_Year,The_Month,The_Day分别引用年，月，日
 //当进行月份和年份的选择时，认为没有选择完整的日期
 showdate.innerText = completely_date;
 Firstday = GetWeekday(The_Year,The_Month);
 ShowCalender(The_Year,The_Month,The_Day,Firstday);
 
}

function nextmonth(The_Year,The_Month)
{
 if (The_Month==12)
  chooseday(The_Year+1,1,0);
 else
  chooseday(The_Year,The_Month+1,0);
}

function prevmonth(The_Year,The_Month)
{
 if (The_Month==1)
  chooseday(The_Year-1,12,0);
 else
  chooseday(The_Year,The_Month-1,0);
}

function prevyear(The_Year,The_Month)
{
 chooseday(The_Year-1,The_Month,0);
}

function nextyear(The_Year,The_Month)
{
 chooseday(The_Year+1,The_Month,0);
}

 

 

function ShowCalender(The_Year,The_Month,The_Day,Firstday)
{

 var showstr;
 var Month_Day;
 var ShowMonth;
 var today;
 today = new Date();
 
 
 
 switch (The_Month)
 {
  case 1 : ShowMonth = "January"; Month_Day = 31; break;
  case 2 :
   ShowMonth = "February";
   if (RunNian(The_Year))
    Month_Day = 29;
   else
    Month_Day = 28;
   break;
  case 3 : ShowMonth = "March"; Month_Day = 31; break;
  case 4 : ShowMonth = "April"; Month_Day = 30; break;
  case 5 : ShowMonth = "May"; Month_Day = 31; break;
  case 6 : ShowMonth = "June"; Month_Day = 30; break;
  case 7 : ShowMonth = "July"; Month_Day = 31; break;
  case 8 : ShowMonth = "August"; Month_Day = 31; break;
  case 9 : ShowMonth = "September"; Month_Day = 30; break;
  case 10 : ShowMonth = "October"; Month_Day = 31; break;
  case 11 : ShowMonth = "November"; Month_Day = 30; break;
  case 12 : ShowMonth = "December"; Month_Day = 31; break;
   
 }
 
 
 showstr = "";
 showstr = "<Table cellpadding=0 cellspacing=0 border=1 bordercolor=#999999 width=95% align=center valign=top>";
 showstr +=  "<tr><td width=0 style='cursor:hand' onclick=prevyear("+The_Year+"," + The_Month + ")>&lt;&lt;</td><td width=0>&nbsp;" + The_Year + "&nbsp;</td><td width=0 onclick=nextyear("+The_Year+","+The_Month+")  style='cursor:hand'>&gt;&gt;</td><td width=0 style='cursor:hand' onclick=prevmonth("+The_Year+","+The_Month+")>&lt;&lt;</td><td width=100 align=center>" + ShowMonth + "</td><td width=0 onclick=nextmonth("+The_Year+","+The_Month+")  style='cursor:hand'>&gt;&gt;</td></tr>";
 showstr +=  "<tr><td align=center width=100% colspan=6>";
 showstr +=  "<table cellpadding=0 cellspacing=0 border=1 bordercolor=#999999 width=100%>";
 showstr += "<Tr align=center bgcolor=#999999> ";
    showstr += "<td><strong><font color=#0000CC>日</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>一</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>二</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>三</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>四</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>五</font></strong></td>";
    showstr += "<td><strong><font color=#0000CC>六</font></strong></td>";
 showstr += "</Tr><tr>";
 
 for (i=1; i<=Firstday; i++)
  showstr += "<Td align=center bgcolor=#CCCCCC>&nbsp;</Td>";
 
 for (i=1; i<=Month_Day; i++)
 {
  if ((The_Year==today.getYear()) && (The_Month==today.getMonth()+1) && (i==today.getDate()))
   bgColor = "#FFCCCC";
  else
   bgColor = "#CCCCCC";
  
  if (The_Day==i) bgColor = "#FFFFCC";
  showstr += "<td align=center bgcolor=" + bgColor + " style='cursor:hand' onclick=chooseday(" + The_Year + "," + The_Month + "," + i + ")>" + i + "</td>";
  Firstday = (Firstday + 1)%7;
  if ((Firstday==0) && (i!=Month_Day)) showstr += "</tr><tr>";
 }
 if (Firstday!=0) 
 {
  for (i=Firstday; i<7; i++)
   showstr += "<td align=center bgcolor=#CCCCCC>&nbsp;</td>";
  showstr += "</tr>";
 }
  
 showstr += "</tr></table></td></tr></table>";
 cc.innerHTML = showstr;  
 

}


</script>

<script language="JavaScript">

 var The_Year,The_Day,The_Month;
 var today;
 var Firstday;
 today = new Date();
 The_Year = today.getYear();
 The_Month = today.getMonth() + 1;
 The_Day = today.getDate();
 Firstday = GetWeekday(The_Year,The_Month);
 ShowCalender(The_Year,The_Month,The_Day,Firstday);
</script>
<div id=showdate></div>
</html>