how to use the javascript module pattern in a real example?

I am trying to understand the JavaScript Module Pattern. I've seen examples of what it should look like, but I don't understand how to use it.

For example, a few things are happening here:

$('input#share').on("click", function() {

    $('.loading').html('<img class="remove_loading" src="/graphics/loading.gif" />');

    var message = $(".wallmessage").val();

    if (message == ""){
        $("#messageempty").jmNotify();
        $('.remove_loading').remove();
    } else {
        addMessage(message);
    }

    return false;
});


function addMessage(message)
{
    $.ajax({
        url: '/test',
        type: 'POST',
        dataType: "json",
        data: {'message' : message},
        success: function(data) {
                ...
        },
        error: function() {
            ...
        }
    });
}

How can I use the above example with:

var myTest = function() {
    var selectId;
    function addMessage () {
        // ...
    }
    return { // public interface
        publicMethod1: function () {
            // all private members are accesible here
        }
    };
};
var start = myTest();

Where do I add the click event, declare my vars, add the addMessage function with the ajax call. and call the addMessage function? Do i have to wrap everything in $(document).ready(function()?

Can anyone shed some light on this for me?

Thanks