// 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 (User == null) var User = {};
User._path = '/dwr';
User.existEmail = function(p0, callback) {
  dwr.engine._execute(User._path, 'User', 'existEmail', p0, callback);
}