Creating custom jQuery function without selector prerequisite

Question

I know that I can create custom jQuery plugins by using the $.fn.myFunction constructor, and the calling the custom function in JavaScript as $(\'selector

Answer 1

(function ($) {
    $.MessageBox = function () {
        var show = function () {
            // something...
        }
        var hide = function () {
            // something...
        }
        return {
            show: show,
            hide: hide
        }
    }
})(Jquery);

I think you better scope to Immediate invocation function to avoid collision with namespaces.