您好，您能否给我看一下我的这个程序。谢谢！

[coast1]

您好，您能否给我看一下我的这个程序。谢谢！
我有一个日历提醒的源程序，当点击每一天时，可以输入今天需要提醒的内容，
我想问的是如何当我改变系统日期和时间时，它会自动的给与提示当天需要提
示的内容。这个输出的函数怎么写呢？谢谢您的帮助。

以下是我的源程序。
<script LANGUAGE="JavaScript">
<!--
var caution = false

function setCookie(name, value, expires, path, domain, secure) {
var curCookie = name + "=" + escape(value) +
((expires) ? "; expires=" + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "")
if (!caution || (name + "=" + escape(value)).length <= 4000)
document.cookie = curCookie
else
if (confirm("Cookie exceeds 4KB and will be cut!"))
document.cookie = curCookie
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
var prefix = name + "="
var cookieStartIndex = document.cookie.indexOf(prefix)
if (cookieStartIndex == -1)
return null
var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length)
if (cookieEndIndex == -1)
cookieEndIndex = document.cookie.length
return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex))
}


function deleteCookie(name, path, domain) {
if (getCookie(name)) {
document.cookie = name + "=" +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
"; expires=Thu, 01-Jan-70 00:00:01 GMT"
}
}


function fixDate(date) {
var base = new Date(0)
var skew = base.getTime()
if (skew > 0)
date.setTime(date.getTime() - skew)
}

function initCookie(monthName) {

var text = ""
for (var i = 1; i <= 31; ++i) {
text += "^" + i + "^"
}

var now = new Date()
fixDate(now)

// set time to one month (31 days) in the future
now.setTime(now.getTime() + 1000 * 60 * 60 * 24 * 31)

setCookie(monthName + "Calendar", text, now)
}

function getSpecificReminder(num, monthName) {
var prefix = "^" + num + "^"
var totalCookie = getCookie(monthName + "Calendar")
var startIndex = totalCookie.indexOf(prefix, 0)
var startData = totalCookie.indexOf("^", startIndex + 1) + 1
if (num == 31)
var endData = totalCookie.length
else
var endData = totalCookie.indexOf("^", startData)

return totalCookie.substring(startData, endData)
}

function setSpecificReminder(num, monthName, newValue) {
var prefix = "^" + num + "^"
var totalCookie = getCookie(monthName + "Calendar")
var startIndex = totalCookie.indexOf(prefix, 0)
var startData = totalCookie.indexOf("^", startIndex + 1) + 1
if (num == 31)
var endData = totalCookie.length
else
var endData = totalCookie.indexOf("^", startData)
var now = new Date()
fixDate(now)

// set time to one month (31 days) in the future
now.setTime(now.getTime() + 1000 * 60 * 60 * 24 * 31)

setCookie(monthName + "Calendar", totalCookie.substring(0, startData) + newValue + totalCookie.substring(endData, totalCookie.length), now)
}

function getInput(num, monthName) {
if (!getCookie(monthName + "Calendar"))
initCookie(monthName)
var newValue = prompt("今天要提醒的事为:", getSpecificReminder(num, monthName))
if (newValue) // user did not cancel
setSpecificReminder(num, monthName, newValue)
}

function getTime() {
// initialize time-related variables with current time settings
var now = new Date()
var hour = now.getHours()
var minute = now.getMinutes()
now = null
var ampm = ""

// validate hour values and set value of ampm
if (hour >= 12) {
hour -= 12
ampm = "PM"
} else
ampm = "AM"
hour = (hour == 0) ? 12 : hour

// add zero digit to a one digit minute
if (minute < 10)
minute = "0" + minute // do not parse this number!

// return time string
return hour + ":" + minute + " " + ampm
}

function leapYear(year) {
if (year % 4 == 0) // basic rule
return true // is leap year
return false // is not leap year
}

[yunxiang]

very difficulty

[coast1]

function getDays(month, year) {
// create array to hold number of days in each month
var ar = new Array(12)
ar[0] = 31 // January
ar[1] = (leapYear(year)) ? 29 : 28 // February
ar[2] = 31 // March
ar[3] = 30 // April
ar[4] = 31 // May
ar[5] = 30 // June
ar[6] = 31 // July
ar[7] = 31 // August
ar[8] = 30 // September
ar[9] = 31 // October
ar[10] = 30 // November
ar[11] = 31 // December

// return number of days in the specified month (parameter)
return ar[month]
}

function getMonthName(month) {
// create array to hold name of each month
var ar = new Array(12)
ar[0] = "一月"
ar[1] = "二月"
ar[2] = "三月"
ar[3] = "四月"
ar[4] = "五月"
ar[5] = "六月"
ar[6] = "七月"
ar[7] = "八月"
ar[8] = "九月"
ar[9] = "十月"
ar[10] = "十一月"
ar[11] = "十二月"

// return name of specified month (parameter)
return ar[month]
}

function setCal() {
// standard time attributes
var now = new Date()
var year = now.getYear()
var month = now.getMonth()
var monthName = getMonthName(month)
var date = now.getDate()
now = null

// create instance of first day of month, and extract the day on which it occurs
var firstDayInstance = new Date(year, month, 1)
var firstDay = firstDayInstance.getDay()
firstDayInstance = null

// number of days in current month
var days = getDays(month, year)

// call function to draw calendar
drawCal(firstDay + 1, days, date, monthName, year)
}

function drawCal(firstDay, lastDate, date, monthName, year) {
// constant table settings
var headerHeight = 30 // height of the table's header cell
var border = 1 // 3D height of table's border
var cellspacing = 2 // width of table's border
var headerColor = "midnightblue" // color of table's header
var headerSize = "+3" // size of tables header font
var colWidth = 50 // width of columns in table
var dayCellHeight = 25 // height of cells containing days of the week
var dayColor = "darkblue" // color of font representing week days
var cellHeight = 20 // height of cells representing dates in the calendar
var todayColor = "red" // color specifying today's date in the calendar
var timeColor = "purple" // color of font representing current time

// create basic table structure
var text = "" // initialize accumulative variable to empty string
text += '<CENTER>'
text += '<TABLE BORDER=' + border + ' CELLSPACING=' + cellspacing + '>' // table settings
text += '<TH COLSPAN=7 ALIGN="center" VALIGN="center" HEIGHT=' + headerHeight + '>' // create table header cell
text += '<FONT COLOR="' + headerColor + '" SIZE=' + headerSize + '>' // set font for table header
text += monthName + ' ' + year
text += '</FONT>' // close table header's font settings
text += '</TH>' // close header cell

// variables to hold constant settings
var openCol = '<TD ALIGN="center" VALIGN="center" WIDTH=' + colWidth + ' HEIGHT=' + dayCellHeight + '>'
openCol += '<FONT COLOR="' + dayColor + '">'
var closeCol = '</FONT></TD>'

// create array of abbreviated day names
var weekDay = new Array(7)
weekDay[0] = "星期日"
weekDay[1] = "星期一"
weekDay[2] = "星期二"
weekDay[3] = "星期三"
weekDay[4] = "星期四"
weekDay[5] = "星期五"
weekDay[6] = "星期六"

// create first row of table to set column width and specify week day
text += '<TR ALIGN="center" VALIGN="center">'
for (var dayNum = 0; dayNum < 7; ++dayNum) {
text += openCol + weekDay[dayNum] + closeCol
}
text += '</TR>'

// declaration and initialization of two variables to help with tables
var digit = 1
var curCell = 1

for (var row = 1; row <= Math.ceil((lastDate + firstDay - 1) / 7); ++row) {
text += '<TR ALIGN="center" VALIGN="top">'
for (var col = 1; col <= 7; ++col) {
if (digit > lastDate)
break
if (curCell < firstDay) {
text += '<TD></TD>';
curCell++
} else {
if (digit == date) { // current cell represent today's date
text += '<TD HEIGHT=' + cellHeight + '>'
text += '<FONT COLOR="' + todayColor + '">'
text += '<A HREF="javascript:getInput(' + digit + ', \'' + monthName + '\')" onMouseOver="window.status = \'Store or retrieve data for ' + monthName + ' ' + digit + '\'; return true"><FONT COLOR="' + todayColor + '">' + digit + '</FONT></A>'
text += '<BR>'
text += '<FONT COLOR="' + timeColor + '" SIZE=2>'
text += '<CENTER>' + getTime() + '</CENTER>'
text += '</FONT>'
text += '</TD>'
} else
text += '<TD HEIGHT=' + cellHeight + '><A HREF="javascript:getInput(' + digit + ', \'' + monthName + '\')" onMouseOver="window.status = \'Store or retrieve data for ' + monthName + ' ' + digit + '\'; return true">' + digit + '</A></TD>'
digit++
}
}
text += '</TR>'
}

// close all basic table tags
text += '</TABLE>'
text += '</CENTER>'

// print accumulative HTML string
document.write(text)
}

setCal()

// -->
</script>