Javascript date function

var today = new Date()
var day = today.getDate()
var month = today.getMonth() + 1
var year = today.getYear()
day = day.toString()
month = month.toString()
year = year.toString()
if (day.length == 1) {day = '0' + day}
if (month.length == 1) {month = '0' + month}
document.write(year + month + day)"