function formatTen(num) {
return num > 9 ? (num + "") : ("0" + num);
}

function formatDate(date) {
var year = date.getFullYear();
var month = date.getMonth() + 1;
var day = date.getDate();
var hour = date.getHours();
var minute = date.getMinutes();
var second = date.getSeconds();
return year + "-" + formatTen(month) + "-" + formatTen(day);
}