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<html>
<head>
<title>Calendar Demo</title>
<script type="text/javascript">
//Constructor
function calendar(id,d,p){
this.id = id;
this.dateObject = d;
this.pix = p;
this.write = writeCalendar;
this.length = getLength;
this.month = d.getMonth();
this.date = d.getDate();
this.day = d.getDay();
this.year = d.getFullYear();
this.getFormattedDate = getFormattedDate;
//get the first day of the month's day
d.setDate(1);
this.firstDay = d.getDay();
//then reset the date object to the correct date
d.setDate(this.date);
}
var days = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday');
var months = new Array('January','February','March','April','May','June','July','August','September','October','November','December');
function getFormattedDate(){
return days[this.day] + ', ' + months[this.month] + ' ' + this.date + ', ' + this.year;
//return this.month + '/' + this.date + '/' + this.year;
}
function writeCalendar(){
var calString = '<div id="calContainer">';
//write month and year at top of table
calString += '<table id="cal' + this.id + '" cellspacing="0" width="200" style="border:1px black solid;">';
//write the image - comment out to hide images
calString += '<tr><th colspan="7"><img src="' + this.pix[this.month].src + '"/></th></tr>';
//write the month
calString += '<tr><th colspan="7" class="month">' + months[this.month] + ', ' + this.year + '</th></tr>';
//write a row containing days of the week
calString += '<tr>';
for(i=0;i<days.length;i++){
calString += '<th class="dayHeader">' + days[i].substring(0,3) + '</th>';
}
//write the body of the calendar
calString += '<tr>';
//create 6 rows so that the calendar doesn't resize
for(j=0;j<42;j++){
var displayNum = (j-this.firstDay+1);
if(j<this.firstDay){
//write the leading empty cells
calString += '<td class="empty"> </td>';
}else if(displayNum==this.date){
calString += '<td id="' + this.id +'selected" class="date" onClick="javascript:changeDate(this,\'' + this.id + '\')">' + displayNum + '</td>';
}else if(displayNum > this.length()){
//Empty cells at bottom of calendar
calString += '<td> </td>';
}else{
//the rest of the numbered cells
calString += '<td id="" class="days" onClick="javascript:changeDate(this,\'' + this.id + '\')">' + displayNum + '</td>';
}
if(j%7==6){
calString += '</tr><tr>';
}
}
//close the last number row
calString += '</tr>';
//write the nav row
calString += '<tr>';
calString += '<td class="nav" style="text-decoration:underline;" onClick="changeMonth(-12,\'' + this.id + '\')"><</td>';
calString += '<td class="nav" onClick="changeMonth(-1,\'' + this.id + '\')"><</td>';
calString += '<td class="month" colspan="3"> </td>';
calString += '<td class="nav" onClick="changeMonth(1,\'' + this.id + '\')">></td>';
calString += '<td class="nav" style="text-decoration:underline;text-align:right;" onClick="changeMonth(12,\'' + this.id + '\')">></td>';
calString += '</tr>';
calString += '</table>';
calString += '</div>';
return calString;
}
function getLength(){
//thirty days has September...
switch(this.month){
case 1:
if((this.dateObject.getFullYear()%4==0&&this.dateObject.getFullYear()%100!=0)||this.dateObject.getFullYear()%400==0)
return 29; //leap year
else
return 28;
case 3:
return 30;
case 5:
return 30;
case 8:
return 30;
case 10:
return 30
default:
return 31;
}
}
function changeDate(td,cal){
//Some JavaScript trickery
//Change the cal argument to the existing calendar object
//This is why the first argument in the constructor must match the variable name
//The cal reference also allows for multiple calendars on a page
cal = eval(cal);
document.getElementById(cal.id + "selected").className = "days";
document.getElementById(cal.id + "selected").id = "";
td.className = "date";
td.id = cal.id + "selected";
//set the calendar object to the new date
cal.dateObject.setDate(td.firstChild.nodeValue);
cal = new calendar(cal.id,cal.dateObject,cal.pix);
//here is where you could react to a date change - I'll just display the formatted date
alert(cal.getFormattedDate());
}
function changeMonth(mo,cal){
//more trickery!
cal = eval(cal);
//The Date object is smart enough to know that it should roll over in December
//when going forward and in January when going back
cal.dateObject.setMonth(cal.dateObject.getMonth() + mo);
cal = new calendar(cal.id,cal.dateObject,cal.pix);
cal.formattedDate = cal.getFormattedDate();
document.getElementById('calContainer').innerHTML = cal.write();
}
</script>
<style rel="stylesheet" type="text/css">
.month, .nav{
background-color: navy;
color: white;
font: 10pt sans-serif;
}
.nav{
cursor: pointer;
cursor: hand;
}
.dayHeader{
color: black;
font: 10pt sans-serif;
border-bottom: 1px black solid;
font-weight: bold;
}
.empty{
background-color: white;
border-bottom: 1px black solid;
}
.days{
color: black;
background-color: rgb(235,235,235);;
font: 10pt sans-serif;
border-bottom: 1px black solid;
border-left: 1px black solid;
border-right: 1px black solid;
cursor: pointer;
cursor: hand;
}
.date{
color: maroon;
font: 10pt sans-serif;
font-weight: bold;
border-bottom: 1px black solid;
border-left: 1px black solid;
border-right: 1px black solid;
cursor: pointer;
cursor: hand;
}
</style>
</head>
<body>
<script language="JavaScript">
//create the pix array
var pix = new Array();
for(i=0; i<12; i++){
pix[i] = new Image();
pix[i].src = 'patternImages/fractal' + i + '.jpg';
}
//Place this script wherever you want your calendar
//The first argument must match the var name
var thisMonth = new calendar('thisMonth',new Date(),pix);
document.write(thisMonth.write());
</script>
</body>
</html>
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