[jQuery] Form validation help

[Brad]

Can anyone tell me how to validate a form field with a Minimium(2)
characters required? Here is what I have below, thank you in advance
for your help!

$().ready(function() {
       // validate signup form on keyup and submit
       $("#signupForm").validate({
               rules: {
                       firstname: "required",
                       lastname: "required",
                       url: {
                               required: false,
                               url: true
                       },
                       businessname: "required",
                       address: "required",
                       city: "required",
                       state: {
                               required: true,
                               digits: false
                       },
                       zip: {
                               required: true,
                               minlength: 5,
                               digits: true
                       },
               messages: {
                       firstname: "Enter contact firstname",
                       lastname: "Enter contact lastname",
                       surl: "Enter a valide URL Ex: http://domain.com";,
                       businessname: "Enter your business name",
                       address: "Enter address",
                       city: "Enter City",
                       state: "Enter State",
                       zip: "Enter Zip"
               }
       });