Magento Product Attribute Show/Hide in Admin Depending on Other Attribute Value

Please past this code in design/adminhtml/catalog/product/edit.phtml

<script type="text/javascript">

    Event.observe(window, 'load', function() {
        var $delDay = $("featured"); // featured is yes/no dropdown id
        if ($delDay.value == 0) {
        $('featured_position').value = ''; // delivery_time is show.hide attribute name
        $('featured_position').disable()
        }
    });

    Event.observe($("featured"), 'change', function() {
        var $delDay = $("featured");
        if ($delDay.value == 1) {
            $('featured_position').enable();
        }
        else {
            $('featured_position').value = '';
            $('featured_position').disable();
        }
    });
</script>