您好，您能否给我看一下我的这个程序。谢谢！

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
}