window.onunload = function() {
        logout();
    }

function logout(reqParam, callback){
        var userManageServiceUrl = "http://" + getServerAddr() + "/axis2/services/UserManageService";
        var urlList = [];
        var url = window.location.href;
        urlList = url.split("?");
        var sessionID = urlList[1];
        reqParam.sessionID = sessionID;
        var pl = new SOAPClientParameters();
        var reqParamStr = JSON.stringify(reqParam);
        pl.add("reqParam", reqParamStr);
        SOAPClient.invoke(userManageServiceUrl, "logout", pl, false, callback);
    }