function post(url, dataObj, success) {
    // Create a FormData object
    const formData = new FormData();

    console.log(dataObj);
    if (dataObj !== undefined) {
        // Populate the FormData object with the object entries
        Object.entries(dataObj).forEach(([key, value]) => {
            formData.append(key, value);
        });
    }

    // Send the POST request with the FormData object
    fetch(url, {
        method: "POST",
        body: formData,
    })
        .then((response) => {
            /*
            if (!response.ok) {
                throw new Error("Network response was not ok");
            }
            */
            return response.json(); // or .text() if the response is not in JSON format
        })
        .then((data) => {
            if (success !== undefined) {
                //const json_data = JSON.parse(data);
                success(data);
                //success(json_data);
            }
            //console.log("Success:", data);
        })
        .catch((error) => {
            console.error("Error:", error);
        });
}


function change_lang(x) {
    var y = document.getElementById("select_lang");
    post('/change_lang/' + y.value, {}, () => {
        window.location.reload();
    }     )
}