DateSelect

Define a div with id and default value:

<div id="start_date"><?= date('Y-m-d'); ?></div>

Init dateselect:

$(function() {
    $('#start_date').dateselect();
});

Or more...

$(function() {
    $('#start_date').dateselect({
        valueField: $('#start_date_value'),
        dateFormat: 'yy-mm-dd',
        change: function() {
            // do something
        }
    });
});