WSDataType = { json: "json", jsonp: "jsonp" };

WS = function(service, dataType) {
    this.service = service;
    if (dataType)
        this.dataType = dataType;
};
WS.prototype = {
    dataType: WSDataType.json,
    service: null,


    call: function(method, args, callback, error) {
        var url = null;
        var service = this.service;
        if (service[service.length - 1] != "/") service += "/";
        if (this.dataType == WSDataType.jsonp) {
            url = $.jmsajaxurl({
                url: service,
                method: method,
                data: args != null ? args : {}
            });
        } else {
            url = service + method;
        }
        var ret
        ret=$.ajax({
           async:false,
            type: this.dataType == WSDataType.json ? "POST" : "GET",
            url: url + ((this.dataType == WSDataType.jsonp) ? "&format=json" : ""),
            data: ((this.dataType == WSDataType.json) ? JSON.stringify(args) : ""),
            cache: false,
            contentType: "application/json; charset=utf-8",
            dataType: this.dataType,
            success: function(response) {
                if (callback)
                    callback(response.d);
            },
            error: error
        });
        return ret
    }
};