选择月份
此脚本是一个很有意思的JavaScript。只要选择任何年份的任意月份， JavaScript将“建立”你的日历月份！非常棒，试试吧
第一步：
在<head>区添加以下内容
<SCRIPT LANGUAGE="JavaScript">
/*****************************************************
* Share JavaScript (http://www.ShareJS.com)
* 使用此脚本程序，请保留此声明
* 获取此脚本以及更多的JavaScript程序，请访问 http://www.ShareJS.com
******************************************************/
function setToday() {
var now = new Date();
var day = now.getDate();
var month = now.getMonth();
var year = now.getYear();
if (year < 2000) // Y2K Fix, Isaac Powell
year = year + 1900; // http://www.sharejs.com
this.focusDay = day;
document.calControl.month.selectedIndex = month;
document.calControl.year.value = year;
displayCalendar(month, year);
}
function isFourDigitYear(year) {
if (year.length != 4) {
alert ("Sorry, the year must be four-digits in length.");
document.calControl.year.select();
document.calControl.year.focus();
} else { return true; }
}
function selectDate() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
displayCalendar(month, year);
}
}
function setPreviousYear() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
year--;
document.calControl.year.value = year;
displayCalendar(month, year);
}
}
function setPreviousMonth() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
if (month == 0) {
month = 11;
if (year > 1000) {
year--;
document.calControl.year.value = year;
}
} else { month--; }
document.calControl.month.selectedIndex = month;
displayCalendar(month, year);
}
}
function setNextMonth() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
if (month == 11) {
month = 0;
year++;
document.calControl.year.value = year;
} else { month++; }
document.calControl.month.selectedIndex = month;
displayCalendar(month, year);
}
}
function setNextYear() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
year++;
document.calControl.year.value = year;
displayCalendar(month, year);
}
}
function displayCalendar(month, year) {
month = parseInt(month);
year = parseInt(year);
var i = 0;
var days = getDaysInMonth(month+1,year);
var firstOfMonth = new Date (year, month, 1);
var startingPos = firstOfMonth.getDay();
days += startingPos;
document.calButtons.calPage.value = " Su Mo Tu We Th Fr Sa";
document.calButtons.calPage.value += "\n --------------------";
for (i = 0; i < startingPos; i++) {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
document.calButtons.calPage.value += " ";
}
for (i = startingPos; i < days; i++) {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
if (i-startingPos+1 < 10)
document.calButtons.calPage.value += "0";
document.calButtons.calPage.value += i-startingPos+1;
document.calButtons.calPage.value += " ";
}
for (i=days; i<42; i++) {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
document.calButtons.calPage.value += " ";
}
document.calControl.Go.focus();
}
function getDaysInMonth(month,year) {
var days;
if (month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12) days=31;
else if (month==4 || month==6 || month==9 || month==11) days=30;
else if (month==2) {
if (isLeapYear(year)) { days=29; }
else { days=28; }
}
return (days);
}
function isLeapYear (Year) {
if (((Year % 4)==0) && ((Year % 100)!=0) || ((Year % 400)==0)) {
return (true);
} else { return (false); }
}
// End -->
</SCRIPT>
第二步：
在<body>区添加以下代码
<CENTER> <H2>选择月份</H2> <FORM NAME="calControl" onSubmit="return false;"> <TABLE CELLPADDING=0 CELLSPACING=0 BORDER=0> <TR><TD COLSPAN=7> <CENTER> <SELECT NAME="month" onChange="selectDate()"> <OPTION>January <OPTION>February <OPTION>March <OPTION>April <OPTION>May <OPTION>June <OPTION>July <OPTION>August <OPTION>September <OPTION>October <OPTION>November <OPTION>December </SELECT> <INPUT NAME="year" TYPE=TEXT SIZE=4 MAXLENGTH=4> <INPUT TYPE="button" NAME="Go" value="Build!" onClick="selectDate()"> </CENTER> </TD> </TR> </FORM> <FORM NAME="calButtons"> <TR><TD align="center"><textarea FONT="Courier" NAME="calPage" WRAP=no ROWS=8 COLS=22 /></TD><TR><TD><CENTER> <INPUT TYPE=BUTTON NAME="previousYear" VALUE=" << " onClick="setPreviousYear()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE=" < " onClick="setPreviousMonth()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE="Today" onClick="setToday()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE=" > " onClick="setNextMonth()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE=" >> " onClick="setNextYear()"> </CENTER></TD></TR> </TABLE></FORM></FONT>
第三步：
修改<body>标签，添加OnLoad事件初始化当前日期
<BODY onLoad="setToday()">
