Custom jQuery Validator Methods/Rules for select drop downs.

gistfile1.js

        // Custom validator method
        $.validator.addMethod("valueNotEqualsVal", function(value, element, arg){
            return arg != value;
        }, "Value must not equal arg.");
        
        $.validator.addMethod("valueNotEqualsTxt", function(value, element, arg){ 
            return return arg != jQuery(element).find('option:selected').text(); 
        }, "Value must not equal arg.");

        // Usage
        $("#someForm").validate({
                rules: {
                    type: { 
                        valueNotEqualsVal: "Choose..." 
                    },
                    size: { 
                        valueNotEqualsTxt: "Choose..." 
                    }
                },
                messages: {
                    type: {
                        valueNotEqualsVal: "Please select a type"
                    },
                    size: {
                        valueNotEqualsTxt: "Please select a size"
                    }
                }
            });