MktoForms2 :: set min date

HTML

<script src="//app-sj01.marketo.com/js/forms2/js/forms2.min.js"></script>
<form id="mktoForm_233"></form>
<script>MktoForms2.loadForm("//app-sj01.marketo.com", "410-XOR-673", 233,
    function(form) 
    {
        var formEl = form.getFormElem()[0],
            sevenDaysFromNow = new Date(); 
            
        sevenDaysFromNow.setDate(new Date().getDate() + 7);
        var sevenDaysFromNowAsFullYear = [
                sevenDaysFromNow.getFullYear(), 
                ("0"+(sevenDaysFromNow.getMonth()+1)).slice(-2), // left-pad with 0
                ("0"+(sevenDaysFromNow.getDate())).slice(-2)
            ].join("-");
     formEl.querySelector('#ArchiveMarketoLastDT__c').setAttribute('min', sevenDaysFromNowAsFullYear);
    });
</script>