$.getJSON(server_data.secure_api+'/e/account/check/?callback=?', queryData,
    function(data) {
        has_error = (data.status == 'failure');
});

jQuery.ajax({
    url:        server_data.secure_api+'/e/account/check/?callback=?',
    data:       queryData,
    DataType:   'jsonp',
    success:    function(result) {
                has_error = (data.status == 'failure');
            },
    async:      false
});