if(typeof Person != "function") 
function Person() {
	this.address = null;
 	this.name = null;
 	this.id = 0;
 	this.salary = 0;
}
if (typeof ObjB != "function") 
	function ObjB() {
 	 this.objA = null;
}
if (typeof ObjA != "function")
	 function ObjA() {
 	this.objB = null;
}
// 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;
	dwr.engine._defaultPath = '/chat/dwr';
if (JavaChat == null) var JavaChat = {};
	JavaChat._path = '/chat/dwr';
	JavaChat.addMessage = function(p0, callback) {
		dwr.engine._execute(JavaChat._path, 'JavaChat', 'addMessage', p0, callback);
}