好的，麻烦提供一份JavaScript编写日历代码。

可以的，以下是一份示例 JavaScript 代码，可以用来编写日历：<script>
var today = new Date();
var currentMonth = today.getMonth();
var currentYear = today.getFullYear();
var selectYear = document.getElementById("year");
var selectMonth = document.getElementById("month");
var months = ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"];

var monthAndYear = document.getElementById("monthAndYear");
showCalendar(currentMonth, currentYear);

function next() {
currentYear = (currentMonth === 11) ? currentYear + 1 : currentYear;
currentMonth = (currentMonth + 1) % 12;
showCalendar(currentMonth, currentYear);
}

function previous() {
currentYear = (currentMonth === 0) ? currentYear - 1 : currentYear;
currentMonth = (currentMonth === 0) ? 11 : currentMonth - 1;
showCalendar(currentMonth, currentYear);
}

function jump() {
currentYear = parseInt(selectYear.value);
currentMonth = parseInt(selectMonth.value);
showCalendar(currentMonth, currentYear);
}

function showCalendar(month, year) {

var firstDay = (new Date(year, month)).getDay();
var daysInMonth = 32 - new Date(year, month, 32).getDate();

var tbl = document.getElementById("calendar-body"); // body of the calendar

// clearing all previous cells
tbl.innerHTML = "";

// filing data about month and in the page via DOM.
monthAndYear.innerHTML = months[month] + " " + year;
selectYear.value = year;
selectMonth.value = month;

// creating all cells
var date = 1;
for (var i = 0; i < 6; i++) {
// creates a table row
var row = document.createElement("tr");

//creating individual cells, filing them up with data.
for (var j = 0; j < 7; j++) {
if (i === 0 && j < firstDay) {
var cell = document.createElement("td");
var cellText = document.createTextNode("");
cell.appendChild(cellText);
row.appendChild(cell);
}
else if (date > daysInMonth) {
break;
}

else {
var cell = document.createElement("td");
var cellText = document.createTextNode(date);
if (date === today.getDate() && year === today.getFullYear() && month === today.getMonth()) {
cell.classList.add("bg-info");
} // color today's date
cell.appendChild(cellText);
row.appendChild(cell);
date++;
}

}

tbl.appendChild(row); // appending each row into calendar body.
}

}
</script>