Help with countdown jquery script to accept unix timestamp as input

I try to modify the keith-wood countdown timer to accept a future unix timestamp and hide the days.

To hide the days you use $('#noDays').countdown({until: liftoffTime, format: 'HMS'}); as the example at http://keith-wood.name/countdown.html under the tab Formats1 says.

I didn't manage yet to make it work. How 开发者_如何学Pythonto modify the code to get a unix timestamp as input and hide the days?

Standard timer

<script type="text/javascript">
$(function () {
    var austDay = new Date();
    austDay = new Date(austDay.getFullYear() + 1, 1 - 1, 26);
    $('#defaultCountdown').countdown({until: austDay});
    $('#year').text(austDay.getFullYear());
});

</script>

My try to have as input a unix timestamp (does not work)

<script type="text/javascript">
$(function () {
    var austDay = new Date();
    austDay = new Date(<?php echo $unixtimestamp; ?>*1000);
    $('#defaultCountdown').countdown({until: austDay});
    $('#year').text(austDay.getFullYear());
});

</script>

You can use the setTime() function:

var austDay = new Date();
austDay.setTime(<?php echo $unixtimestamp * 1000; ?>);

Edit: added * 1000 to go from unix timestamp to javascript timestamp...