JavaScrip源码:日历式时间程序

<script language="JavaScript">

<!-- Hide this script from old browsers --

setCal()

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

/* else */ // else not needed when statement is "return"

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 ar[month]

}

function getMonthName(month) {

// create array to hold name of each month

var ar = new Array(12)

ar[0] = "1月"

ar[1] = "2月"

ar[2] = "3月"

ar[3] = "4月"

ar[4] = "5月"

ar[5] = "6月"

ar[6] = "7月"

ar[7] = "8月"

ar[8] = "9月"

ar[9] = "10月"

ar[10] = "11月"

ar[11] = "12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 = 25 // height of the table's header cell

var border = 1 // 3D height of table's border

var cellspacing = 1 // width of table's border

var headerColor = "midnightblue" // color of table's header

var headerSize = "4" // size of tables header font

var colWidth = 15 // width of columns in table

var dayCellHeight = 12 // 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 = "black" // color of font representing current time

// create basic table structure

var text = "" // initialize accumulative variable to empty string

text += '<CENTER>'

text += '<TABLE bgcolor=moccasin 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 += year +'年'+monthName

text += '</FONT>'

text += '<FONT COLOR="' + timeColor + '" >'

text += getTime()

　

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] = "日"

weekDay[1] = "一"

weekDay[2] = "二"

weekDay[3] = "三"

weekDay[4] = "四"

weekDay[5] = "五"

weekDay[6] = "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>'

　

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) {

text += '<TD HEIGHT=' + cellHeight + '>'

text += '<FONT COLOR="' + todayColor + '">'

text += digit

text += '</FONT><BR>'

　

text += '</TD>'

} else

text += '<TD HEIGHT=' + cellHeight + '>' + digit + '</TD>'

digit++

}

}

text += '</TR>'

}

text += '</TABLE>'

text += '</CENTER>'

document.write(text)

}

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</script>