function extractDetalisFromDB(){
    db.transaction(queryDB, errorCB);
}


// Extracting the relevant data - there is always only one user in the db, hence the 'id=1'
function queryDB(tx) {
    tx.executeSql('SELECT * FROM currentUser WHERE id=1', [], querySuccess, onError);
}


function querySuccess(tx, results) {
   var len = results.rows.length;
   currentUserName = results.rows.item(0).name;
   currentUserEmail = results.rows.item(0).data;
}

function validateNewPost() {
    // Here I validate the data from the form... works well.

    if(error_appear === "false") {
        extractDetalisFromDB();
        console.log(currentUserName + ' ' + currentUserEmail);  // This is undefined
        var newPostJson = { writer: currentUserEmail, title: title.value, artist: artist.value,
                           albumOrSong: albumSong.value, content: content.value, genre:
                           genre.value};

        $.post(URLAddress + '/addPost', newPostJson).done(function(data) {});
        window.location = '#index';
    }
}