MediaWiki:Gadget-blockuser.js

/* Adds a link on userpages to Special:BlockUser */
addOnloadHook(function() {
  if (wgTitle.indexOf("/") != -1 || document.title.indexOf("- History -") != -1)  //no subpages or history
     return;
  if (wgCanonicalNamespace == "User" || wgCanonicalNamespace == "User_talk") {
     var username = encodeURIComponent( wgTitle );
     addPortletLink("p-cactions", wgServer + "/wiki/Special:BlockUser/" + username, "Block user", "ca-contrib", "Block this user");
  }
});