Tabelle Spalte mit JavaScript ausblenden

<html>
<head>
    <title>Hide table column using JavaScript</title>
    <script language="javascript">
        function hideCol() {
            var col = document.getElementById("txtCol").value;
            if (isNaN(col) || col == "") {
                alert("Invalid Column");
                return;
            }
            col = parseInt(col, 10);
            col = col - 1;
            var tbl = document.getElementById("tblMain");
            if (tbl != null) {
                if (col < 0 || col >= tbl.rows.length - 1) {
                    alert("Invalid Column");
                    return;
                }
                for (var i = 0; i < tbl.rows.length; i++) {
                    for (var j = 0; j < tbl.rows[i].cells.length; j++) {
                        tbl.rows[i].cells[j].style.display = "";
                        if (j == col)
                            tbl.rows[i].cells[j].style.display = "none";
                    }
                }
            }
        }
    </script>
</head>
<body>
    <center>
        Enter Column Number :
        <input type="text" id="txtCol" /><input type="button" value="Hide" onclick="hideCol();" />
        <br />
        (Enter column number in the Textbox and click on Hide Example:1,2,3,..)
        <br />
        <br />
    </center>
    <table align="center" id="tblMain" border="1" style="cursor: pointer;">
        <tr>
            <td>
                Heading 1
            </td>
            <td>
                Heading 2
            </td>
            <td>
                Heading 3
            </td>
            <td>
                Heading 4
            </td>
        </tr>
        <tr>
            <td>
                R1C1
            </td>
            <td>
                R1C2
            </td>
            <td>
                R1C3
            </td>
            <td>
                R1C4
            </td>
        </tr>
        <tr>
            <td>
                R2C1
            </td>
            <td>
                R2C2
            </td>
            <td>
                R2C3
            </td>
            <td>
                R2C4
            </td>
        </tr>
        <tr>
            <td>
                R3C1
            </td>
            <td>
                R3C2
            </td>
            <td>
                R3C3
            </td>
            <td>
                R3C4
            </td>
        </tr>
        <tr>
            <td>
                R4C1
            </td>
            <td>
                R4C2
            </td>
            <td>
                R4C3
            </td>
            <td>
                R4C4
            </td>
        </tr>
    </table>
</body>
</html>
Meandering Meerkat