jquery validate plugin combine field validation

On one form I have City, State, ZIP code on one line in the fo开发者_如何学运维rm (inside one block element).

My error div for the validate plugin slides nicely under the form div so that message is contextual.

Is there a way to combine a rule so that it's not 3 separate validation rules? In other words, if city is blank, or state is blank, or ZIP is blank, I want to trigger just one error message div "City, State and ZIP code are required". Likewise if 2 of 3 or 3 of 3 are blank I still want to have just one error div returned by validate.

You can make use of the groups and errorPlacement option to your needs. For example (taken from http://docs.jquery.com/Plugins/Validation/validate):

$("#myform").validate({
  groups: {
    username: "fname lname"
  },
  errorPlacement: function(error, element) {
     if (element.attr("name") == "fname" 
                 || element.attr("name") == "lname" )
       error.insertAfter("#lastname");
     else
       error.insertAfter(element);
   },
   debug:true
 });