;

I managed to do it, it was simpler then I expected (as usual), when I first got in the right direction.)
<html>
<head>
<title>Hide Table Columns</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('td:nth-child(2)').show();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
$('a#mon').click(function() {
$('td:nth-child(2)').fadeIn();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
});
$('a#tue').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').fadeIn();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
});
$('a#wed').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').fadeIn();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
});
$('a#thu').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').fadeIn();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
});
$('a#fri').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').fadeIn();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').hide();
});
$('a#sat').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').fadeIn();
$('td:nth-child(8)').hide();
});
$('a#sun').click(function() {
$('td:nth-child(2)').hide();
$('td:nth-child(3)').hide();
$('td:nth-child(4)').hide();
$('td:nth-child(5)').hide();
$('td:nth-child(6)').hide();
$('td:nth-child(7)').hide();
$('td:nth-child(8)').fadeIn();
});
});
</script>
</head>
<body>
<table border="1">
<tr>
<td>Weekday</td>
<td>Monday</td>
<td>Tuesday</td>
<td>Wednesday</td>
<td>Thursday</td>
<td>Friday</td>
<td>Saturday</td>
<td>Sunday</td>
</tr>
</table>
<a href="#" id="mon">Monday</a>
<a href="#" id="tue">Tuesday</a>
<a href="#" id="wed">Wednesday</a>
<a href="#" id="thu">Thursday</a>
<a href="#" id="fri">Friday</a>
<a href="#" id="sat">Saturday</a>
<a href="#" id="sun">Sunday</a>
</body>
</html>