Ah of course - many thanks Jason.
I have used the following to achieve just that:
<?php
if (isset($_GET["ArchiveMonth"])) {
$_SESSION["passedMonth"] = $_GET["ArchiveMonth"];
} else {
if(isset($_SESSION["passedMonth"])) unset($_SESSION["passedMonth"]);
}
if (isset($_GET["ArchiveYear"])) {
$_SESSION["passedYear"] = $_GET["ArchiveYear"];
} else {
if(isset($_SESSION["passedYear"])) unset($_SESSION["passedYear"]);
}
?>
Thanks again
Jamie