function changeCurrency(newCurrency) {
    var parameters = { currency: newCurrency };
    ajax('/settings/changecurrency/format/json', parameters, function (data) {
                                                       document.location.href = document.location.href;
                                                    });
}

function ajax(script, parameters, successFunction, errorFunction) {
    $.ajax( {
        url: script,
        data: parameters,
        type: "POST",
        success: function (data) {
            if (typeof(successFunction) != 'undefined')
                successFunction(data);
        },
        error: function (data) {
            if (typeof(errorFunction) != 'undefined')
                errorFunction(data);
        }
    } );
}