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cal.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JavaScript Calendar with Bootstrap</title>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
box-sizing: border-box;
background-color: #f8f9fa;
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
}
th, td {
border: 1px solid #ddd;
padding: 8px;
text-align: center;
background-color: #ffffff;
}
th {
background-color: #007bff;
color: #ffffff;
}
h2 {
color: #007bff;
margin-top: 20px;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-4">
<h2 id="month-year"></h2>
<table id="calendar"></table>
</div>
<div class="col-md-4">
<h2 id="next-month-year-1"></h2>
<table id="next-calendar-1"></table>
</div>
<div class="col-md-4">
<h2 id="next-month-year-2"></h2>
<table id="next-calendar-2"></table>
</div>
</div>
</div>
<!-- Bootstrap JS and Popper.js -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script>
function generateCalendar(tableId, headerId, year, month) {
const monthNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
const dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
const firstDay = new Date(year, month, 1);
const lastDay = new Date(year, month + 1, 0);
const daysInMonth = lastDay.getDate();
const calendarTable = document.getElementById(tableId);
const monthYearHeader = document.getElementById(headerId);
monthYearHeader.textContent = `${monthNames[firstDay.getMonth()]} ${firstDay.getFullYear()}`;
// Add day names row
if (calendarTable.rows.length === 0) {
const headerRow = calendarTable.insertRow();
dayNames.forEach(day => {
const headerCell = headerRow.insertCell();
headerCell.textContent = day;
headerCell.style.fontWeight = "bold";
});
}
let dayCounter = 1;
for (let i = 0; i < 6; i++) {
const row = calendarTable.insertRow();
for (let j = 0; j < 7; j++) {
const cell = row.insertCell();
if ((i === 0 && j < firstDay.getDay()) || dayCounter > daysInMonth) {
cell.textContent = "";
} else {
cell.textContent = dayCounter;
dayCounter++;
}
}
}
}
const currentDate = new Date();
generateCalendar("calendar", "month-year", currentDate.getFullYear(), currentDate.getMonth());
generateCalendar("next-calendar-1", "next-month-year-1", currentDate.getFullYear(), currentDate.getMonth() + 1);
generateCalendar("next-calendar-2", "next-month-year-2", currentDate.getFullYear(), currentDate.getMonth() + 2);
</script>
</body>
</html>