// 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 (UserValidator == null) var UserValidator = {};
UserValidator._path = '/dwr';
UserValidator.existeUsuario = function(p0, callback) {
  dwr.engine._execute(UserValidator._path, 'UserValidator', 'existeUsuario', p0, false, callback);
}