var datetime = new Date();
var year = datetime.getFullYear();
var month = datetime.getMonth() + 1 < 10 ? "0" + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
var date = datetime.getDate() < 10 ? "0" + datetime.getDate() : datetime.getDate();
原文：http://www.cnblogs.com/cmyxn/p/6266602.html