<html>
<head>
<script>
function show_hide_column(col_no, do_show) {
var stl;
if (do_show) stl = 'block'
else stl = 'none';
var tbl = document.getElementById('id_tabel');
var rows = tbl.getElementsByTagName('tr');
for (var row=0; row<rows.length;row++) {
var cels = rows[row].getElementsByTagName('td')
cels[col_no].style.display=stl;
}
}
</script>
</head>
<body>
<table id='id_tabel' border=1>
<tr><td>kolom 1</td><td>kolom 2</td><td>kolom 3</td><td>kolom 4</td></tr>
<tr><td>kolom 1</td><td>kolom 2</td><td>kolom 3</td><td>kolom 4</td></tr>
<tr><td>kolom 1</td><td>kolom 2</td><td>kolom 3</td><td>kolom 4</td></tr>
</table>
<form>
Enter column no: <input type='text' name=col_no>
<br> <input type='button' onClick='javascript:show_hide_column(col_no.value, true);' value='tampil'>
<input type='button' onClick='javascript:show_hide_column(col_no.value, false);' value='sembunyi'>
</form>
</body>
</html>
