// 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 (HeartBeatJS == null) var HeartBeatJS = {};
HeartBeatJS._path = '/dwr';
HeartBeatJS.pulse = function(callback) {
  dwr.engine._execute(HeartBeatJS._path, 'HeartBeatJS', 'pulse', callback);
}