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JavaScript 实现日历式日期选择

摘要: JavaScript 实现日历式日期选择


HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<head>

Canlender--JavaScript

</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++) 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 += "<td></td>";
showstr += "<td></td>";
showstr += "<td></td>";
showstr += "<td></td>";
showstr += "<td></td>";
showstr += "<td></td>";
showstr += "<td></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>



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