FoxyShop: Custom End Date With Dropdown Selector

<script type="text/javascript">
//Setup your product with an end date of SOMETHING (like +1 day)
jQuery(document).ready(function($){
    //Setup
    $("#fs_sub_enddate_<?php echo $product['id'] ?>").attr('name', 'sub_enddate<?php echo foxyshop_get_verification('sub_enddate', '--OPEN--'); ?>').val('');
    $("select.variation-subscription-end-date").change(function() {
        if ($(this).val().indexOf("No End Date") >= 0) {
            $("#fs_sub_enddate_<?php echo $product['id'] ?>").val('');
        } else if ($(this).val().indexOf("End After 3 Months") >= 0) {
            $("#fs_sub_enddate_<?php echo $product['id'] ?>").val('<?php echo Date("Ymd", strtotime("+2 months +1 day")); ?>');
        } else if ($(this).val().indexOf("End After 6 Months") >= 0) {
            $("#fs_sub_enddate_<?php echo $product['id'] ?>").val('<?php echo Date("Ymd", strtotime("+5 months +1 day")); ?>');
        }
    });
});
</script>