[jQuery] Does it hurt to call functions that don't do anything on the page?

[Beau]

So I have my document.ready function, looks something like this:

$(document).ready(function(){
        ManageCategoriesClick();
        HideByDefault();
        PrepareSplitForm();
        SetUpAdvertPopup();
        CheckAll();
        CheckNone();
        EditCategoryInPlace();
        PreparePaneLinks();
        PrepareToolTips();
});

Those functions all call things, but many are for specific pages. Does
it slow the page down if they don't find the elements the functions
call? What's the best way to call functions that are specific to a
single page?

-beau