get_post_meta problem

Hi
why do “.countdownhorse” only get the first timestamp ?

<?php $timestamp = get_post_meta($post->ID, 'sale_price_dates_to');?>
<?php
foreach ($timestamp as $value) {
    echo $value;
    ?>
    <script type="text/javascript">
	$(function () {
        $('.countdownhest').countdown({until: new Date(<?=date('Y, n-1, j', $test)?>), compact: true,
        layout: '<b>{dn} Dage {hnn}{sep}{mnn}{sep}{snn}</b> {desc}', description: ''});
	});
	</script>
    <?php
}
?>