[jQuery] Bindind keydown function to a form - submit on keydown (value change)

Hi,
I am trying to make a form to run a function on keyup, keydown.
The markup is:

<select id="family">
        <option value="Georgia" label="Georgia">Georgia</option>
        <option value="Times New Roman" label="Times New Roman">Times New
Roman</option>
        <option value="HelveticaNeue-Light" label="Helvetica Neue
Light">Helvetica Neue Light</option>
</select>

I made a function that change the font-family on click:

<script type="text/javascript">
$(document).ready(function(){

$('#family').click(function() {
     value = $(this).val();
     $('.cica').css('font-family', value)
         });
});

//capture the down key
$("#family").bind("keydown", function(e) {
if (e.keyCode == 40) {
value = $(this).val();
$('#family').css('font-family', value)
return false; //prevent default behavior
}
});

</script>


I am trying to bind a keydown to this form so when I press Down key
the form change its value and execute the function - change the font-
family.
It looks that my bind keydown does nothing. What should I change here?

Thank you.