function saveFoodToDatabase(dag, typeFood, calories) {
    db.transaction(saveFoodDB, errorDB, successDB);
    function saveFoodDB(tx) {
        getNewDatabaseID(function callback(_newID) {
            var newID = _newID;
            alert(dag + ' ' + newID);
            tx.executeSql('INSERT INTO tabel (_id, datum, food, cal) VALUES ('
                + newID + ' , date("now" , "-' + dag + ' days"), "'
                + typeFood + '" , ' + calories + ')');
        });
    }
    function errorDB(err) {
        alert("Error processing SQLsave: " + err);
    }
    function successDB() {
        $.mobile.changePage("#dayPage");
    }
}

function getNewDatabaseID(callback) {
    db.transaction(getMaxIDDB, errorDB);
    function getMaxIDDB(tx) {
        tx.executeSql('SELECT _id FROM tabel ORDER BY _id DESC', [], querySuccess, queryError);
    }
    function errorDB(err) {
        alert("Error processing SQLnew: " + err);
    }
    function queryError(err) {
        alert("ERROR reading SQL" + err);
    }
    function querySuccess(tx, results) {
        callback(results.rows.item(0)._id + 1);
    }
}