[jQuery] jquery validation "min" rule

Hi,
I would like to know how to use the "min value" rule for a select box.
I have to use it adding the rule to the class in the html markup, not
in the validate() method due to I generate the name of the select
dinamically.
I've tried this:
<select name="myselect_Idnumber" class="min(1)" >
<select name="myselect_Idnumber" class="min: 1" >
but doesn't work.
Any idea?