function getDateDiff(date1) {

    var re = /^(\d{4})\S(\d{1,2})\S(\d{1,2})$/;
    var dt1, dt2;
    if (re.test(date1)) {
        dt1 = new Date(RegExp.$1, RegExp.$2 - 1, RegExp.$3);
    }

    dt2 = new Date();

    return Math.floor((dt2 - dt1) / (1000 * 60 * 60 * 24))

}