Kalender

// ****************************************************** // Author: Breck Morrison // Date: 07-22-1999 // ****************************************************** // Defining global variable elements var elementA; var elementB; var elementC; var the_Mon; var the_Day; var the_Year; var monthName = new Array ("Januar","Februar","März","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember") // ****************************************************** // FUNCTION createCalendar // opens a new window for the calendar // ****************************************************** function createCalendar(A, B, C) { elementA = A; elementB = B; elementC = C; calendarWindow = window.open(".","Kalender","width=166,height=155,resizable=no,scrollbars=no,status=no"); // Get todays Date Object var today = new Date(); // Allows them to select which month to start with on calendar from drop down box named month // var mthIdx = month.options.selectedIndex // Instead I will pull the current month from date object (today) var mth = today.getMonth(); // Allows them to select which year to start with on calendar from drop down box named year // var yearVal = year.options[year.options.selectedIndex].text // Instead I will pull the current year from date object (d) var yearVal = today.getFullYear(); // call the function to populate the window generateCalendar(calendarWindow, mth, yearVal) } // ****************************************************** // FUNCTION generateCalendar // generates the meat of the calendar // ****************************************************** function generateCalendar(target, mth, year) { // begin table for calendar target.document.open() calendar = "Kalender" calendar +="" calendar +="" var endday = getDaysInMonth(mth, year) var goPrevMonth = prevMonth(mth) var goNextMonth = nextMonth(mth) var nextYear = changeYear("next",mth,parseInt(year)) var prevYear = changeYear("prev",mth,parseInt(year)) //writes month and next and back buttons calendar +="" calendar +="" calendar +="" calendar +="

" + monthName[mth] + " " + year + "

" target.document.close(); //writes in the day of the week labels calendar +="" calendar +="" calendar +="" //calendar +="" calendar +="

So

Mo

Di

Mi

Do

Fr

Sa

Su

Mo

Tu

We

Th

Fr

Sa

" // get the first day of the month thedate = new Date (year, mth, 1); firstDay = thedate.getDay() selectedmonth = mth; var today = new Date(); var thisyear = today.getYear() + 1900; selectedyear = year var lastDay = (endday + firstDay+1) calendar +="" for (var i = 1; i < lastDay; i++) { if (i <= firstDay) { // 'empty' boxes prior to first day calendar +="" } else { // enter date number var lookd = today.getDate() var lookm = today.getMonth() if (( selectedmonth == lookm ) && ( lookd == (i-firstDay) )) { calendar +="\n" } else { calendar +="\n" }} //must start new row after each week if (i % 7 == 0 && i != lastDay) { calendar +="" } } calendar +="

" + (i-firstDay) + "

" + (i-firstDay) + "

" target.document.write(calendar); target.document.close() } // ****************************************************** // FUNCTION closeCalendar // changes date field when a date is clicked // ****************************************************** function closeCalendar(m, d, y) { elementA.value = m+1; elementB.value = d; elementC.value = y; } // ****************************************************** // FUNCTION getDaysInMonth // finds the number of days in the month (mthldx) // ****************************************************** function getDaysInMonth(mth, YrStr) { // all the rest have 31 var maxDays=31 // expect Feb. (of course) if (mth==1) { if (isLeapYear(YrStr)) { maxDays=29; } else { maxDays=28; } } // thirty days hath... if (mth==3 || mth==5 || mth==8 || mth==10) { maxDays=30; } return maxDays; } // ****************************************************** // FUNCTION isLeapYear // finds if the year (yrStr) is a leap year // ****************************************************** function isLeapYear(yrStr) { var leapYear=false; var year = parseInt(yrStr, 10); // every fourth year is a leap year if (year%4 == 0) { leapYear=true; // unless it's a multiple of 100 if (year%100 == 0) { leapYear=false; // unless it's a multiple of 400 if (year%400 == 0) { leapYear=true; } } } return leapYear; } // ****************************************************** // FUNCTION nextMonth // finds the next month // ****************************************************** function nextMonth(month) { if (month==11) { return 0; } else { return (month+1); } } // ****************************************************** // FUNCTION prevMonth // finds the previous month // ****************************************************** function prevMonth(month) { var prevMonth = (month-1) if (month==0) { prevMonth = 11; } return prevMonth } // ****************************************************** // FUNCTION changeYear // increments or decrements month when it goes past Jan or Dec // ****************************************************** function changeYear(direction,month,year) { var theYear = year if (direction=="next") { if (month == 11) { theYear = (year+1) } } if (direction=="prev") { if (month == 0) { theYear = (year-1) } } return theYear }