MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */
$(function() {
    // Get the current document title
    var currentTitle = document.title;

    // Remove the namespace part (if exists) from the title
    var newTitle = currentTitle.replace(/^.*?:\s*/, "");

    // Set the updated title
    document.title = newTitle;
});