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