[jQuery] Undefined function

[jQuery] Undefined function


I have been having trouble trying to define a function. I've tried
every idea I have come across on the internet but nothing worked. I
hope some one here has an of how to get it defined properly.
The code that is not defined is:
var currentUl = 1;
function showMe(n) {
    $("ul#gallery").click(function(){
        $("#"+currentUl).hide();
        $("#"+n).show();
        $("div#picture").show();
        $("span#picture").show();
        $("img#space").hide();
    });
currentUl = n;
};
This basic setup has worked for me in the past with just pure
javascript.
The html I am using to call it is:
onclick="showMe('3');"
I am referencing the function with an:
id="1"
I would appreciate any help you can offer.
Thanks a lot