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■ 語法主題：備忘錄月曆

■ 控制碼內容：
將下面複製至 <body> 標籤後

<script LANGUAGE="JavaScript">
<!--

//
// Cookie functions to store and retrieve cookies
//

// Boolean variable specified if alert should be displayed if cookie exceeds 4KB
var caution = false

// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
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))
}

// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
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"
	}
}

// date - any instance of the Date object
// * you should hand all instances of the Date object to this function for "repairs"
// * this function is taken from Chapter 14, "Time and Date in JavaScript", in "Learn Advanced JavaScript Programming"
function fixDate(date) {
	var base = new Date(0)
	var skew = base.getTime()
	if (skew > 0)
		date.setTime(date.getTime() - skew)
}

function initCookie(monthName) {
	// initializes cookie with the following format:
	// ^1^^2^^3^^4^...^30^^31^

// initialize accumulative variable
	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("Enter reminder for current date:", 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
}

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] = "January"
	ar[1] = "February"
	ar[2] = "March"
	ar[3] = "April"
	ar[4] = "May"
	ar[5] = "June"
	ar[6] = "July"
	ar[7] = "August"
	ar[8] = "September"
	ar[9] = "October"
	ar[10] = "November"
	ar[11] = "December"

// 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, 00 + year)
}

function drawCal(firstDay, lastDate, date, monthName, year) {
	// constant table settings
	var headerHeight = 50 // height of the table's header cell
	var border = 1 // 3D height of table's border
	var cellspacing = 0 // width of table's border
	var headerColor = "midnightblue" // color of table's header
	var headerSize = "+3" // size of tables header font
	var colWidth = 60 // 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 = 40 // 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 bordercolor=black BORDER=' + border + ' CELLSPACING=' + cellspacing + '>' // table settings
	text += 	'<TH COLSPAN=7 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 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] = "Sun"
	weekDay[1] = "Mon"
	weekDay[2] = "Tues"
	weekDay[3] = "Wed"
	weekDay[4] = "Thu"
	weekDay[5] = "Fri"
	weekDay[6] = "Sat"
	
	// 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="right" 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>