// Provide a default path to dwr.engine
if (dwr == null) var dwr = {};
if (dwr.engine == null) dwr.engine = {};
if (DWREngine == null) var DWREngine = dwr.engine;

if (OptInDwr == null) var OptInDwr = {};
OptInDwr._path = '/dwr2';
OptInDwr.doOptIn = function(callback) {
  dwr.engine._execute(OptInDwr._path, 'OptInDwr', 'doOptIn', false, false, callback);
}