按时间显示隐藏

var now_time = getNowFormatDate();
if(now_time <= '2017-06-26 22:00:00') {
    document.getElementById("google_image_div").style.visibility="visible";
    stats('show');
}

function getNowFormatDate() {
    var date = new Date();
    var seperator1 = "-";
    var seperator2 = ":";

    var months = date.getMonth() + 1;
    var days = date.getDate();
    var hours = date.getHours();
    var minutes = date.getMinutes();
    var seconds = date.getSeconds();

    months = format(months);
    days = format(days);
    hours = format(hours);
    minutes = format(minutes);
    seconds = format(seconds);

    var currentdate = date.getFullYear() + seperator1 + months + seperator1 + days
                    + " " + hours + seperator2 + minutes + seperator2 + seconds;
    return currentdate;
}