var weeks = new Array('日','月','火','水','木','金','土');
var lastup = new Date(document.lastModified);
var month = lastup.getMonth() + 1; // 月
var day = lastup.getDate(); // 日
var week = weeks[ lastup.getDay() ]; // 曜日
if(month< 10) { month = "0" + month; }
if(day< 10) { day = "0" + day; }
document.write('' + month + '<br>月<br>' + day + '<br>日<br>（' + week + '）');