MVC Adding methods into jquery.validate.unobtrusive.js

Question

I recently had a question on getting checkbox validation working on the client side within a MVC project. This question was successfully answered, but raised another query.

Answer 1

I have no problem adding this code to an external javascript file, which i pilfered from This site

// Custom validator for checkboxs
jQuery.validator.unobtrusive.adapters.add("brequired", function (options) {    
    //bool-required for checkboxes    
    if (options.element.tagName.toUpperCase() == "INPUT" && 
        options.element.type.toUpperCase() == "CHECKBOX") 
    {
        options.rules["required"] = true;        
        if (options.message) {
            options.messages["required"] = options.message;
        }
    }
});

Are you certain that you put your script AFTER the jquery scripts in your page? Mine is the last in the list.