Salve ho una pagina del tris dove il click delle caselle è gestito tramite e.target, quello che vorrei fare è gestire il click delle caselle con l'evento onclick ma non saprei come fare. Allego il link della pagina http://lyokocode.altervista.org/Tris-js.html e il codice della pagina:

codice:
function TicTacToe(selector) {

    var main_element = $(selector)[0],
        score_X = $('.score.X')[0],
        score_O = $('.score.O')[0],
        board = $('.board')[0],
        grid_options = $('.grid-options')[0],
        reset_btn = $('.btn-reset')[0];

    var grid_size = 3,
        moves = 0,
        scores = {
            X: 0,
            O: 0
        },
        data = {};

    $('.grid-options').change(function(e) {
      grid_size = $(this).val();
      init();
    });

    init();
    
    $('.btn-reset').click(function(e) {
      reset_btn = init();
    });

    function paint() {
        var table = '<table>';
        for (var i = 0; i < grid_size; i++) {
            table += '<tr>';
            for (var j = 0; j < grid_size; j++) {
                table += '<td row="' + i + '" column="' + j + '"></td>';
            }
            table += "</tr>";
        }
        $(board).html(table);

        var columns = $('td');
        for (i = 0; i < columns.length; i++) {
            $(columns[i]).click(function(e) {
            td = mark(e);
            })
        }

    }

    function mark(e) {

        var evt = e || event;
        var td = evt.target || evt.srcElement;

        if ($(td).html()) {
            return;
        }

        var row = $(td).attr('row'),
            column = $(td).attr('column');

        var current_mark = moves % 2 === 0
            ? 'X'
            : 'O';

        $(td).html(current_mark);
        $(td).addClass(current_mark);
        data[row + '' + column] = current_mark;

        moves++;

        if (didWin(current_mark)) {
            alert(current_mark + ' vince la partita!');
            scores[current_mark]++;
            updateScoreboard();
            empty();
        } else if (moves === Math.pow(grid_size, 2)) {
            alert("Pareggio!");
            empty();
        }

    }

    function didWin(mark) {

        var vertical_count = 0,
            horizontal_count = 0,
            right_to_left_count = 0,
            left_to_right_count = 0;

        for (var i = 0; i < grid_size; i++) {

            vertical_count = 0;
            horizontal_count = 0;

            for (var j = 0; j < grid_size; j++) {

                if (data[i + '' + j] == mark) {
                    horizontal_count++;
                }

                if (data[j + '' + i] == mark) {
                    vertical_count++;
                }

            }

            if (data[i + '' + i] == mark) {
                left_to_right_count++;
            }

            if (data[(grid_size - 1 - i) + '' + i] == mark) {
                right_to_left_count++;
            }

            if (horizontal_count == grid_size || vertical_count == grid_size) {
                return true;
            }

        }

        if (left_to_right_count == grid_size || right_to_left_count == grid_size) {
            return true;
        }

        return false;
    }

    function empty() {
        moves = 0;
        paint();
        data = {};
    }

    function init() {
        empty();
        scores = {
            X: 0,
            O: 0
        };
        updateScoreboard();
    }

    function updateScoreboard() {
        $('.score.X').html(scores.X);
        $('.score.O').html(scores.O);
    }

}
codice:
TicTacToe('.game-panel');
Nel codice var td = evt.target || evt.srcElement è gestito tramite e.target ma non saprei come farlo tramite evento onclick.