var weeks = new Array('日', '月', '火', '水', '木', '金', '土');
var d = new Date();

// 年月日・曜日・時分秒の取得
var year   = d.getFullYear();
var month  = d.getMonth() + 1;
var day    = d.getDate();
var week   = weeks[ d.getDay() ];
var hour   = d.getHours();
var minute = d.getMinutes();
var second = d.getSeconds();

// 1桁を2桁に変換する
if (month < 10) {month = "0" + month;}
if (day < 10) {day = "0" + day;}
if (hour < 10) {hour = "0" + hour;}
if (minute < 10) {minute = "0" + minute;}
if (second < 10) {second = "0" + second;}

alert( year + " " + month + " " + day + " " + week + hour + ":" + minute + ":" + second);