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$(function() {
var elem = document.createElement('div');
elem.className = 'portal';
elem.id = 'p-usertoolbox';
elem.innerHTML = '<h5 lang="en" xml:lang="en">User toolbox</h5><div class="body"><ul></ul></div>'

var panel = document.getElementById('panel');
if(panel) panel.appendChild(elem);

// mw.util.addPortletLink('p-usertoolbox', 'http://example.com', 'Example');
});