PHP - No Refresh

At the very top of your php page put:

<?php setcookie("norefresh","1") ?>

It is VERY important that it is the FIRST line in your php page.

Then here is the php code that only displays the conversion code the first time.

<?php if ($_COOKIE["norefresh"] == "") { ?>

conversion code goes here

<? } ?>

By the way...this is the FIRST time you have looked at this page.