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| Current File : /home1/savoy/www/savoyglobal.net/hr/assets/js/datepickr.js |
/*
datepickr - pick your date not your nose
Copyright (c) 2010
*/
function datepickr(id, userConfig) {
var config = {
fullCurrentMonth: true,
dateFormat: 'F jS, Y'
},
currentDate = new Date(),
// shortcuts to get date info
get = {
current: {
year: function() {
return currentDate.getFullYear();
},
month: {
integer: function() {
return currentDate.getMonth();
},
string: function(full) {
var date = currentDate.getMonth();
return monthToStr(date, full);
}
},
day: function() {
return currentDate.getDate();
}
},
month: {
integer: function() {
return currentMonthView;
},
string: function(full) {
var date = currentMonthView;
return monthToStr(date, full);
},
numDays: function() {
// checks to see if february is a leap year otherwise return the respective # of days
return (get.month.integer() == 1 && !(currentYearView & 3) && (currentYearView % 1e2 || !(currentYearView % 4e2))) ? 29 : daysInMonth[get.month.integer()];
}
}
},
// variables used throughout the class
weekdays = ['Sun', 'Mon', 'Tues', 'Wednes', 'Thurs', 'Fri', 'Satur'],
months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
suffix = { 1: 'st', 2: 'nd', 3: 'rd', 21: 'st', 22: 'nd', 23: 'rd', 31: 'st' },
element, container, body, month, prevMonth, nextMonth,
currentYearView = get.current.year(),
currentMonthView = get.current.month.integer(),
i, x, buildCache = [];
function build(nodeName, attributes, content) {
var element;
if(!(nodeName in buildCache)) {
buildCache[nodeName] = document.createElement(nodeName);
}
element = buildCache[nodeName].cloneNode(false);
if(attributes != null) {
for(var attribute in attributes) {
element[attribute] = attributes[attribute];
}
}
if(content != null) {
if(typeof(content) == 'object') {
element.appendChild(content);
} else {
element.innerHTML = content;
}
}
return element;
}
function monthToStr(date, full) {
return ((full == true) ? months[date] : ((months[date].length > 3) ? months[date].substring(0, 3) : months[date]));
}
function formatDate(milliseconds) {
var formattedDate = '',
dateObj = new Date(milliseconds),
format = {
d: function() {
var day = format.j();
return (day < 10) ? '0' + day : day;
},
D: function() {
return weekdays[format.w()].substring(0, 3);
},
j: function() {
return dateObj.getDate();
},
l: function() {
return weekdays[format.w()] + 'day';
},
S: function() {
return suffix[format.j()] || 'th';
},
w: function() {
return dateObj.getDay();
},
F: function() {
return monthToStr(format.n(), true);
},
m: function() {
var month = format.n() + 1;
return (month < 10) ? '0' + month : month;
},
M: function() {
return monthToStr(format.n(), false);
},
n: function() {
return dateObj.getMonth();
},
Y: function() {
return dateObj.getFullYear();
},
y: function() {
return format.Y().substring(2, 4);
}
},
formatPieces = config.dateFormat.split('');
for(i = 0, x = formatPieces.length; i < x; i++) {
formattedDate += format[formatPieces[i]] ? format[formatPieces[i]]() : formatPieces[i];
}
return formattedDate;
}
function handleMonthClick() {
// if we go too far into the past
if(currentMonthView < 0) {
currentYearView--;
// start our month count at 11 (11 = december)
currentMonthView = 11;
}
// if we go too far into the future
if(currentMonthView > 11) {
currentYearView++;
// restart our month count (0 = january)
currentMonthView = 0;
}
month.innerHTML = get.month.string(config.fullCurrentMonth) + ' ' + currentYearView;
// rebuild the calendar
while(body.hasChildNodes()){
body.removeChild(body.lastChild);
}
body.appendChild(buildCalendar());
bindDayLinks();
return false;
}
function bindMonthLinks() {
prevMonth.onclick = function() {
currentMonthView--;
return handleMonthClick();
}
nextMonth.onclick = function() {
currentMonthView++;
return handleMonthClick();
}
}
// our link binding function
function bindDayLinks() {
var days = body.getElementsByTagName('a');
for(i = 0, x = days.length; i < x; i++) {
days[i].onclick = function() {
element.value = formatDate(new Date(currentYearView, currentMonthView, this.innerHTML).getTime());
close();
return false;
}
}
}
function buildWeekdays() {
var html = document.createDocumentFragment();
// write out the names of each week day
for(i = 0, x = weekdays.length; i < x; i++) {
html.appendChild(build('th', {}, weekdays[i].substring(0, 2)));
}
return html;
}
function buildCalendar() {
// get the first day of the month we are currently viewing
var firstOfMonth = new Date(currentYearView, currentMonthView, 1).getDay(),
// get the total number of days in the month we are currently viewing
numDays = get.month.numDays(),
// declare our day counter
dayCount = 0,
html = document.createDocumentFragment(),
row = build('tr');
// print out previous month's "days"
for(i = 1; i <= firstOfMonth; i++) {
row.appendChild(build('td', {}, ' '));
dayCount++;
}
for(i = 1; i <= numDays; i++) {
// if we have reached the end of a week, wrap to the next line
if(dayCount == 7) {
html.appendChild(row);
row = build('tr');
dayCount = 0;
}
// output the text that goes inside each td
// if the day is the current day, add a class of "today"
row.appendChild(build('td', { className: (i == get.current.day() && currentMonthView == get.current.month.integer() && currentYearView == get.current.year()) ? 'today' : '' }, build('a', { href: 'javascript:void(0)' }, i)));
dayCount++;
}
// if we haven't finished at the end of the week, start writing out the "days" for the next month
for(i = 1; i <= (7 - dayCount); i++) {
row.appendChild(build('td', {}, ' '));
}
html.appendChild(row);
return html;
}
function open() {
document.onclick = function(e) {
e = e || window.event;
var target = e.target || e.srcElement;
var parentNode = target.parentNode;
if(target != element && parentNode != container) {
while(parentNode != container) {
parentNode = parentNode.parentNode;
if(parentNode == null) {
close();
break;
}
}
}
}
bindDayLinks();
container.style.display = 'block';
}
function close() {
document.onclick = null;
container.style.display = 'none';
}
function initialise(userConfig) {
if(userConfig) {
for(var key in userConfig) {
if(config.hasOwnProperty(key)) {
config[key] = userConfig[key];
}
}
}
var inputLeft = inputTop = 0,
obj = element;
if(obj.offsetParent) {
do {
inputLeft += obj.offsetLeft;
inputTop += obj.offsetTop;
} while (obj = obj.offsetParent);
}
container = build('div', { className: 'calendar' });
container.style.cssText = 'display: none; position: absolute; top: ' + (inputTop + element.offsetHeight) + 'px; left: ' + inputLeft + 'px; z-index: 9999;';
var months = build('div', { className: 'months' });
prevMonth = build('span', { className: 'prev-month' }, build('a', { href: '#' }, '<'));
nextMonth = build('span', { className: 'next-month' }, build('a', { href: '#' }, '>'));
month = build('span', { className: 'current-month' }, get.month.string(config.fullCurrentMonth) + ' ' + currentYearView);
months.appendChild(prevMonth);
months.appendChild(nextMonth);
months.appendChild(month);
var calendar = build('table', {}, build('thead', {}, build('tr', { className: 'weekdays' }, buildWeekdays())));
body = build('tbody', {}, buildCalendar());
calendar.appendChild(body);
container.appendChild(months);
container.appendChild(calendar);
document.body.appendChild(container);
bindMonthLinks();
element.onfocus = open;
}
return (function() {
element = document.getElementById(id);
initialise(userConfig);
})();
}