var date = new Date();

​

function toISOString(date) {

    return date.toISOString().substr(0, 10);

}

​

function concat(date) {

    var d = date.getDate();

    var m = date.getMonth() + 1;

    var y = date.getFullYear();

    var day = d <= 9 ? '0' + d : '' + d;

    var month = m <= 9 ? '0' + m : '' + m;

    var year = '' + y;

    return day + '-' + month + '-' + year;

}