Change value of session variable by clicking href

Hi

Like to change the value of a session variable by clicking a link

------------------------------
<?php
session_start();
session_register("cat");
?>
<a href="index.php" onMousedown=<? $_SESSION['cat']=1; ?>Set cat to
1</a>
<a href="index.php" onMousedown=<? $_SESSION['cat']=2; ?>Set cat to
1</a>
-----------------------------

Any ideas why this is not working and how I could do it?

Cheers
Sunnyboy

sunnyboy@europe.com wrote:
> Any ideas why this is not working and how I could do it?
>

You are making the mistake to mix client side (javascript) and server side
(PHP). Consider the following revision:

<?php
session_start();

if (isset($_GET['cat'])) {
$_SESSION['cat'] = $_GET['cat'];
}
print isset($_SESSION['cat']) ? "cat is {$_SESSION['cat']}" : 'cat is not
set<br />';
?>
<a href="index.php?cat=1">Set cat to1</a>
<a href="index.php?cat=2">Set cat to 2</a>


JW

Hmm, what you are trying to do is to control php directly through
javascript. it doesn't work that way...
Here is an example that would work:

<?php
session_start();
if ( isset($_GET['cat']) ) { $_SESSION['cat'] = $_GET['cat'];
}
else {
$_SESSION['cat']=0;
}
?>
<a href="index.php?cat=1">et cat to 1</a>
<a href="index.php?cat=2">et cat to 2</a>
Cat is : <?php echo $_SESSION['cat']; ?>