Requirement: Inserting a calendar button, with today’s date highlighted and adding (MM/DD/YYYY) so that if dates are being entered the user knows the format.
/*Upload both the JavaScript and CSS files in portfolio and then call it in html as below*/
/*Calender.js*/
function positionInfo(object) {
var p_elm = object;
this.getElementLeft = getElementLeft;
function getElementLeft() {
var x = 0;
var elm;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
while (elm != null) {
if(elm.style.position == ‘relative’) {
break;
}
else {
x += elm.offsetLeft;
elm = elm.offsetParent;
}
}
return parseInt(x);
}
this.getElementWidth = getElementWidth;
function getElementWidth(){
var elm;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
return parseInt(elm.offsetWidth);
}
this.getElementRight = getElementRight;
function getElementRight(){
return getElementLeft(p_elm) + getElementWidth(p_elm);
}
this.getElementTop = getElementTop;
function getElementTop() {
var y = 0;
var elm;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
while (elm != null) {
if(elm.style.position == ‘relative’) {
break;
}
else {
y+= elm.offsetTop;
elm = elm.offsetParent;
}
}
return parseInt(y);
}
this.getElementHeight = getElementHeight;
function getElementHeight(){
var elm;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
return parseInt(elm.offsetHeight);
}
this.getElementBottom = getElementBottom;
function getElementBottom(){
return getElementTop(p_elm) + getElementHeight(p_elm);
}
}
function CalendarControl() {
var calendarId = ‘CalendarControl’;
var currentYear = 0;
var currentMonth = 0;
var currentDay = 0;
var selectedYear = 0;
var selectedMonth = 0;
var selectedDay = 0;
var months = [‘January’,’February’,’March’,’April’,’May’,’June’,’July’,’August’,’September’,’October’,’November’,’December’];
var dateField = null;
function getProperty(p_property){
var p_elm = calendarId;
var elm = null;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
if (elm != null){
if(elm.style){
elm = elm.style;
if(elm[p_property]){
return elm[p_property];
} else {
return null;
}
} else {
return null;
}
}
}
function setElementProperty(p_property, p_value, p_elmId){
var p_elm = p_elmId;
var elm = null;
if(typeof(p_elm) == “object”){
elm = p_elm;
} else {
elm = document.getElementById(p_elm);
}
if((elm != null) && (elm.style != null)){
elm = elm.style;
elm[ p_property ] = p_value;
}
}
function setProperty(p_property, p_value) {
setElementProperty(p_property, p_value, calendarId);
}
function getDaysInMonth(year, month) {
return [31,((!(year % 4 ) && ( (year % 100 ) || !( year % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][month-1];
}
function getDayOfWeek(year, month, day) {
var date = new Date(year,month-1,day)
return date.getDay();
}
this.clearDate = clearDate;
function clearDate() {
dateField.value = ”;
hide();
}
this.setDate = setDate;
function setDate(year, month, day) {
if (dateField) {
if (month < 10) {month = “0” + month;}
if (day 12) {
currentMonth = 1;
currentYear++;
} else if(currentMonth < 1) {
currentMonth = 12;
currentYear–;
}
calendar = document.getElementById(calendarId);
calendar.innerHTML = calendarDrawTable();
}
this.changeYear = changeYear;
function changeYear(change) {
currentYear += change;
currentDay = 0;
calendar = document.getElementById(calendarId);
calendar.innerHTML = calendarDrawTable();
}
function getCurrentYear() {
var year = new Date().getYear();
if(year < 1900) year += 1900;
return year;
}
function getCurrentMonth() {
return new Date().getMonth() + 1;
}
function getCurrentDay() {
return new Date().getDate();
}
function calendarDrawTable() {
var dayOfMonth = 1;
var validDay = 0;
var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
var daysInMonth = getDaysInMonth(currentYear, currentMonth);
var css_class = null; //CSS class for each day
var table = “
”;
table = table + “
”;
table = table + “
| S |
M |
T |
W |
T |
F |
S |
”;
for(var week=0; week < 6; week++) {
table = table + “
”;
for(var dayOfWeek=0; dayOfWeek daysInMonth) {
validDay = 0;
}
if(validDay) {
if (dayOfMonth == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
css_class = ‘current’;
} else if (dayOfWeek == 0 || dayOfWeek == 6) {
css_class = ‘weekend’;
} else {
css_class = ‘weekday’;
}
table = table + “
”+dayOfMonth+” |
”;
dayOfMonth++;
} else {
table = table + “
|
”;
}
}
table = table + “
”;
}
table = table + “
”;
table = table + “
”;
return table;
}
this.show = show;
function show(field) {
can_hide = 0;
// If the calendar is visible and associated with
// this field do not do anything.
if (dateField == field) {
return;
} else {
dateField = field;
}
if(dateField) {
try {
var dateString = new String(dateField.value);
var dateParts = dateString.split(“/”);
selectedMonth = parseInt(dateParts[0],10);
selectedDay = parseInt(dateParts[1],10);
selectedYear = parseInt(dateParts[2],10);
} catch(e) {}
}
if (!(selectedYear && selectedMonth && selectedDay)) {
selectedMonth = getCurrentMonth();
selectedDay = getCurrentDay();
selectedYear = getCurrentYear();
}
currentMonth = selectedMonth;
currentDay = selectedDay;
currentYear = selectedYear;
if(document.getElementById){
calendar = document.getElementById(calendarId);
calendar.innerHTML = calendarDrawTable(currentYear, currentMonth);
setProperty(‘display’, ‘block’);
var fieldPos = new positionInfo(dateField);
var calendarPos = new positionInfo(calendarId);
var x = fieldPos.getElementLeft();
var y = fieldPos.getElementBottom();
setProperty(‘left’, x + “px”);
setProperty(‘top’, y + “px”);
if (document.all) {
setElementProperty(‘display’, ‘block’, ‘CalendarControlIFrame’);
setElementProperty(‘left’, x + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘top’, y + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘width’, calendarPos.getElementWidth() + “px”, ‘CalendarControlIFrame’);
setElementProperty(‘height’, calendarPos.getElementHeight() + “px”, ‘CalendarControlIFrame’);
}
}
}
this.hide = hide;
function hide() {
if(dateField) {
setProperty(‘display’, ‘none’);
setElementProperty(‘display’, ‘none’, ‘CalendarControlIFrame’);
dateField = null;
}
}
this.visible = visible;
function visible() {
return dateField
}
this.can_hide = can_hide;
var can_hide = 0;
}
var calendarControl = new CalendarControl();
function showCalendarControl(textField) {
// textField.onblur = hideCalendarControl;
calendarControl.show(textField);
}
function clearCalendarControl() {
calendarControl.clearDate();
}
function hideCalendarControl() {
if (calendarControl.visible()) {
calendarControl.hide();
}
}
function setCalendarControlDate(year, month, day) {
calendarControl.setDate(year, month, day);
}
function changeCalendarControlYear(change) {
calendarControl.changeYear(change);
}
function changeCalendarControlMonth(change) {
calendarControl.changeMonth(change);
}
document.write(“”);
document.write(“
”);
——————————————————————————————————————————–
/* Calender.css*/
#CalendarControlIFrame { display: none; left: 0px; position: absolute; top: 0px; height: 250px; width: 250px; z-index: 99;} #CalendarControl { position:absolute; background-color:#FFF; margin:0; padding:0; display:none; z-index: 100;} #CalendarControl table { font-family: arial, verdana, helvetica, sans-serif; font-size: 8pt; border-left: 1px solid #336; border-right: 1px solid #336;} #CalendarControl th { font-weight: normal;} #CalendarControl th a { font-weight: normal; text-decoration: none; color: #FFF; padding: 1px;} #CalendarControl td { text-align: center;} #CalendarControl .header { background-color: #336;} #CalendarControl .weekday { background-color: #DDD; color: #000;} #CalendarControl .weekend { background-color: #FFC; color: #000;} #CalendarControl .current { border: 1px solid #339; background-color: #336; color: #FFF;} #CalendarControl .weekday,#CalendarControl .weekend,#CalendarControl .current { display: block; text-decoration: none; border: 1px solid #FFF; width: 2em;} #CalendarControl .weekday:hover,#CalendarControl .weekend:hover,#CalendarControl .current:hover { color: #FFF; background-color: #336; border: 1px solid #999;} #CalendarControl .previous { text-align: left;} #CalendarControl .next { text-align: right;} #CalendarControl .previous,#CalendarControl .next { padding: 1px 3px 1px 3px; font-size: 1.4em;} #CalendarControl .previous a,#CalendarControl .next a { color: #FFF; text-decoration: none; font-weight: bold;} #CalendarControl .title { text-align: center; font-weight: bold; color: #FFF;} #CalendarControl .empty { background-color: #CCC; border: 1px solid #FFF;}
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