JavaScript Countdown Timer to specific time everyday

Question

I am currently developing a website with a countdown timer at the headline: http://iphone.myhandykey.com/

The current timer is just 12hrs + few mins.. What I would like

Answer 1

Something like this:

    $(document).ready(function () {
        var mg = new Date(2016, 5, 21, 0, 0, 0, 0);
        var tmr = window.setInterval(function () {
            var d = new Date();
            var dif = mg - d;
            var s = parseInt(dif / 1000);
if (s < 0) {
    document.getElementById('spCnt').innerHTML = 'Event starts';
    window.clearInterval(tmr);
    return;
}
            var sec = s % 60;
            var m = parseInt(s / 60);
            var min = m % 60;
            var h = parseInt(m / 60);
            var hour = h % 24;
            d = parseInt(h / 24);

            document.getElementById('spCnt').innerHTML = d + ' days ' + hour + ' hours ' + min + ' min and ' + sec + ' sec remaining';
        }, 1000);
    });