TicTacToeAi

//* Simple AI easy*//
function getRandom() {
    var random = Math.floor((Math.random() * 8) + 1);
    var thiscell = tdArray[random]; //*
    if (thiscell.textContent == '') {
        thiscell.textContent = "O";
        thiscell.onclick = '';
    }
    else {
        for (var i = 0; i < tdArray.length; i++) {
            if (tdArray[i].textContent == '') {
                tdArray[i].textContent = "O";
                break;
            }
        }
    }
}
function aiMove() {
    if (tdArray[1].textContent == '' && ((tdArray[0].textContent == "X" && tdArray[2].textContent == "X") ||
        (tdArray[4].textContent == "X" && tdArray[5].textContent == "X"))) {
        tdArray[1].textContent = "O";
        tdArray[1].onclick = '';

    }
    else if (tdArray[3].textContent == '' && ((tdArray[0].textContent == "X" && tdArray[6].textContent == "X") ||
        (tdArray[4].textContent == "X" && tdArray[5].textContent == "X"))) {
        tdArray[3].textContent = "O";
        tdArray[3].onclick = '';

    }
    else if (tdArray[5].textContent == '' && ((tdArray[2].textContent == "X" && tdArray[8].textContent == "X") ||
        (tdArray[3].textContent == "X" && tdArray[4].textContent == "X"))) {
        tdArray[5].textContent = "O";
        tdArray[5].onclick = '';

    }
    else if (tdArray[7].textContent == '' && ((tdArray[6].textContent == "X" && tdArray[8].textContent == "X") ||
        (tdArray[1].textContent == "X" && tdArray[4].textContent == "X"))) {
        tdArray[7].textContent = "O";
        tdArray[7].onclick = '';

    }
    else if (tdArray[0].textContent == '' && ((tdArray[1].textContent == "X" && tdArray[2].textContent == "X") ||
        (tdArray[3].textContent == "X" && tdArray[4].textContent == "X") ||
        (tdArray[4].textContent == "X" && tdArray[8].textContent == "X"))) {
        tdArray[0].textContent = "O";
        tdArray[0].onclick = '';

    }
    else if (tdArray[2].textContent == '' && ((tdArray[0].textContent == "X" && tdArray[1].textContent == "X") ||
        (tdArray[5].textContent == "X" && tdArray[8].textContent == "X") ||
        (tdArray[6].textContent == "X" && tdArray[4].textContent == "X"))) {
        tdArray[2].textContent = "O";
        tdArray[2].onclick = '';

    }
    else if (tdArray[6].textContent == '' && ((tdArray[0].textContent == "X" && tdArray[3].textContent == "X") ||
        (tdArray[7].textContent == "X" && tdArray[8].textContent == "X") ||
        (tdArray[2].textContent == "X" && tdArray[4].textContent == "X"))) {
        tdArray[6].textContent = "O";
        tdArray[6].onclick = '';

    }
    else if (tdArray[8].textContent == '' && ((tdArray[2].textContent == "X" && tdArray[5].textContent == "X") ||
        (tdArray[6].textContent == "X" && tdArray[7].textContent == "X") ||
        (tdArray[0].textContent == "X" && tdArray[4].textContent == "X"))) {
        tdArray[8].textContent = "O";
        tdArray[8].onclick = '';

    }
    else {
        getRandom();
    }
}