MediaWiki:Common.js

$(document).ready(function () {
    if (mw.config.get('wgPageName') !== 'Special:UserLogin') {
        const banner = document.createElement('div');
        banner.id = 'asx-top-banner';
        banner.innerHTML = '<img src="https://asxresearch.org/images/a/aa/ASX-Header-Banner2.png" alt="ASX Header">';

        const interval = setInterval(function () {
            const tabs = document.querySelector('.vector-page-toolbar-container');
            if (tabs && tabs.parentNode) {
                tabs.parentNode.insertBefore(banner, tabs);
                clearInterval(interval);
            }
        }, 50);
    }
});