change session variables?

[Jay]

You could have some code at the beginning which unsets the session variable. This would mean the session variable is only set once that form has been submitted (and if they go back to it, they'll have to do it again).

Or the other way is before you set the variable on the 'action' page, unset it first!

[qadeerbk]

Hello Jay

you can just update your session variables like

suppose you have a form like

<form.......>
<input type="text" name="xyz">
</form>

and in your action page you can code it like
<?PHP
session_register("abc");
$abc = $xyz // (the variable comming from form)
?>

I am doing it so because the Form variables are Golbal ones and it will be cofusing to overwrite the global variables

[Jay]

Err, hello

I personally use the SGAs, in which there's no need to explicitely declare a variable as a session variable! Your code would work, but it would be a little confusing.