var today = new Date();
var thisHours = today.getHours();
var thisMinutes = today.getMinutes();
var weekdayNames = ['Chủ nhật', 'Thứ Hai', 'Thứ Ba', 'Thứ Tư', 'Thứ Năm', 'Thứ Sáu', 'Thứ Bảy'];
var weekdayNamesEN = ['Sunday', 'Monday', 'Tuesday', 'Webnesday', 'Thursday', 'Friday', 'Saturday'];
var monthNamesR = ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12'];
var thisDay = today.getDay();
var thisDate = today.getDate();
var currMonth = today.getMonth();
var currYear = today.getFullYear();
if(today.getMinutes() < 10) {thisMinutes = "0" + today.getMinutes()};
if(today.getHours() < 10) {thisHours = "0" + today.getHours()};
if(today.getDate() < 10) {thisDate = "0" + today.getDate()};
function datetime() {
document.write(weekdayNames[thisDay] + ", ngày " + thisDate + "/" + monthNamesR[currMonth] + "/" + currYear)
}

function datetime_en() {
document.write(weekdayNamesEN[thisDay] + ", " + monthNamesR[currMonth] + "/" + thisDate + "/" + currYear)
}