[jQuery] Validate selectedValue in a combobox

[jQuery] Validate selectedValue in a combobox


Hi all,
I have a simple combobox like this:
<form id="myForm" action="" method="post">
<select id="city">
<option value="">Select a city</option>
<option value="1">Milan</option>
<option value="2">Turin</option>
<option value="3">Rome</option>
<option value="4">Venice</option>
</select>
</form>
and a validation rule like this:
$('form#myForm').validate({
rules: {
city: {
required: true
}
},
messages: {
city: {
required: "<span style='color:#ff0000;'>Please,
select a city</span>"
}
}
});
The problem is that doesn't work!
Where I've wrong?
Thanks a lot.
Luis