MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */

addOnloadHook(function() {
        var elems = document.getElementsByClassName('editsection');
        for (i = 0; i < elems.length; i++) {
                var span = document.createElement('span');
                var link = document.createElement('a');
                link.href = '#top';
                link.appendChild(document.createTextNode('back to top'));
                span.appendChild(document.createTextNode('['));
                span.appendChild(link);
                span.appendChild(document.createTextNode('] '));
                elems[i].insertBefore(span, elems[i].firstChild);
        }
});