function WRSManager() {
	
	// ### Public Methods ###
	this.getActiveUser = _getActiveUser;
	this.login  = _login;
	this.loginXML  = _loginXML;
	this.logout = _logout;
	this.update = _update;
	this.createUser = _createUser;
	
	this.removeCDMCookies = _removeCDMCookies;

	// ### Private Attributes ###
	var getUserActiveURL = '/wrs/action/update/getUserActiveJSON';
	var logoutURL = '/wrs/action/signon/logoutXML';
	var loginURL  = '/wrs/action/signon/newLogin';
	var loginXMLURL  = '/wrs/action/signon/loginXML';
	var updateURL = '/wrs/action/update/loadUser';
	var createUserURL = '/wrs/action/update/newUser';
	
	// ### Private Methods ###
	function _createUser(product, urls) {
		document.location.href = createUserURL + '?site=' + product.site + '&tool=' + product.tool + '&url=' + escape(urls.url) + '&previousurl=' + escape(urls.previousurl);
	}
	function _login(product, urls) {
		document.location.href = loginURL + 
		'?site=' + product.site + 
		((product.tool)? '&tool=' + product.tool: '') + 
		'&url=' + escape(urls.url) + 
		((urls.previousurl)? '&previousurl=' + escape(urls.previousurl): '');
	}
	function _loginXML(user, product, source){
		_ajax({
			type: "GET",
			url: loginXMLURL + '?tool=' + product.tool +
							'&site=' + product.site +
							'&userName=' + user.userName +
							'&password=' + user.password,
			success: source.callback
		});
	}
	function _update(urls) {
		if (document.cookie.indexOf("wrs=") < 0) {
			alert('Sua sessão expirou.');
			document.cookie = "cdmuser=" + escape("-none") + ";path=/;";
			document.location.reload();
		} else {
			document.location.href = updateURL + 
			'?url=' + escape(urls.url) + 
			((urls.previousurl)? '&previousurl=' + escape(urls.previousurl): '');
		}
	}
	function _getActiveUser(source, product) {
		try {
			_ajax({
				type: "GET",
				url: getUserActiveURL + '?site=' + product.site + ((product.tool)? '&tool=' + product.tool: ''),
				success: function(text) {
					source.callBack( eval( text ) );
				}
			});
		} catch (err) {
			alert('Não foi possível buscar o usuário logado: ' + err.message);
		}
	}
	function _logout(source, params) {
		try {
			_ajax({
				type: "GET",
				url: logoutURL,
				success: function(xml){
					if (xml) {
						var dto = xml.getElementsByTagName('dto')[0];
						source.callBack( dto.getAttribute('status'), params );
					}
				}
			});
		} catch (err) {
			alert('Não foi possível buscar o usuário logado: ' + err.message);
		}
	}
	function _removeCDMCookies(domain){
		document.cookie = "DBSESSIONID=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		
		document.cookie = "cdmuser=-none;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "PID=;path=/;domain=" + domain + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "pid=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "USER=;path=/;domain=" + domain + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "USER=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "reducedname=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "firstname=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
		document.cookie = "lastname=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
	function _ajax(req){
		if (req.type == undefined) req.type = 'GET';
		if (req.async == undefined) req.async = true;
		
		var xmlhttp = null;
		
		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try { 
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (E) { 
				xmlhttp = false; 
			} 
		}		

		if ( !xmlhttp && typeof XMLHttpRequest != 'undefined' ) {
			xmlhttp = new XMLHttpRequest();
		}
	    
		var isWordpress = (new RegExp("wp\.[a-zA-Z0-9-]*\.com\.br", "gi")).test(document.location.host);
		var url = req.url;
		if ( isWordpress ) {
			url = '/wp-admin/wrs_proxy.php?url=http://www.clicrbs.com.br'+ escape(req.url);
		}

		//Abre a conexao
	    xmlhttp.open(req.type, url, req.async);

		//Funcao para tratamento do retorno
	    xmlhttp.onreadystatechange = function() {
	        if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
	        	dataType = xmlhttp.getResponseHeader("Content-Type");
	        	if (dataType.indexOf('text/xml') >= 0)
	        		req.success(xmlhttp.responseXML);
	        	else
	        		req.success(xmlhttp.responseText);
	        }
	    }

	    //Executa
		try {
			xmlhttp.send(null)
		} catch (e) {}
	}
}
// ### Static attributes and methods
WRSManager.instance = null;
WRSManager.getInstance = function() {
	if (WRSManager.instance == null)
		WRSManager.instance = new WRSManager();
	return WRSManager.instance;
}