js 遍历行和列

var table = document.getElementsByTagName("table")[];

    //遍历列
    for (var i = ; i < table.rows[].cells.length; i++) {
        console.log(table.rows[].cells[i].innerText);
        if (!table.rows[].cells[i].innerText) { }
    }

    //遍历行
    for (var i = ; i < table.rows.length; i++) {
        var row = table.rows[i];
        console.log(row.cells[].innerText);
    }