아래의 코드에는 버그가 있네요. 다시 올립니다.


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>

<BODY>

<form method=post action="a2_post.php">
<input type=button value="행추가" onclick="add_row();">
<input type=button value="열추가" onclick="add_col();">
<input type=button value="행삭제" onclick="del_row();">
<input type=button value="열삭제" onclick="del_col();">
<table id='stock_table' border=1>
    <thead id='stock_thead'>
        <tr>
            <td>
                <input type=text name=opty size=4>
                <input type=text name=optx size=4>
            </td>
            <td>
                <input type=text name='optx_subj[]' size=10>
            </td>
        </tr>
    </thead>
    <tbody id='stock_tbody'>
        <tr>
            <td><input type=text name='opty_subj[]' size=10></td>
            <td><input type=text name='opt[0][]' size=10></td>
        </tr>
    </tbody>
</table>

<input type=submit>
</form>

<span id=msg></span>

<script>
var stock_table = document.getElementById('stock_table');
var stock_thead = document.getElementById('stock_thead');
var stock_tbody = document.getElementById('stock_tbody');
var stock_tr = null;
var stock_td = null;
var stock_x = 0;
var stock_y = 0;
var msg = document.getElementById('msg');

function add_row()
{
    // 행 제목 추가
    stock_tr = document.createElement('tr');
    stock_tbody.appendChild(stock_tr);
    stock_td = document.createElement('td');
    stock_tr.appendChild(stock_td);
    add_input('opty_subj[]');
    stock_y++;

    // 열의 갯수에 따라 추가된 행의 열 추가
    var stock_thead_td = stock_thead.getElementsByTagName('td');
    for (i=0; i<stock_thead_td.length-1; i++)
    {
        stock_td = document.createElement('td');
        stock_tr.appendChild(stock_td);
        add_input('opt['+stock_y+'][]');
    }
}

function add_col()
{
    // 열 제목 추가
    var stock_thead_tr = stock_thead.getElementsByTagName('tr');
    stock_td = document.createElement('td');
    stock_thead_tr[0].appendChild(stock_td);
    add_input('optx_subj[]');

    var stock_tbody_tr = stock_tbody.getElementsByTagName('tr');
    for (i=0; i<stock_tbody_tr.length; i++) {
        stock_td = document.createElement('td');
        stock_tbody_tr[i].appendChild(stock_td);
        add_input('opt['+i+'][]');
    }
}

function add_input(name)
{
    var inp = document.createElement('input');
    inp.setAttribute('type', 'text');
    inp.setAttribute('size', '10');
    inp.setAttribute('name', name);
    stock_td.appendChild(inp);
}

function del_row()
{
    var stock_tbody_tr = stock_tbody.getElementsByTagName('tr');
    if (stock_tbody_tr.length > 1) {
        stock_tbody.deleteRow(stock_tbody_tr.length-1);
        stock_y--;
    }
}

function del_col()
{
    var stock_thead_tr = stock_thead.getElementsByTagName('tr');
    var stock_thead_td = stock_thead.getElementsByTagName('td');
    if (stock_thead_td.length > 2) {
        stock_thead_tr[0].deleteCell(stock_thead_td.length-1);

        var stock_tbody_tr = stock_tbody.getElementsByTagName('tr');
        for (i=0; i<stock_tbody_tr.length; i++) {
            var tr_td = stock_tbody_tr[i].getElementsByTagName('td');
            stock_tbody_tr[i].deleteCell(tr_td.length-1);
        }
    }
}
</script>

</BODY>
</HTML>