Security Assist Access Rules cant be used for this.
you need to hand code the if statement for checking for null values:
<?php if ("".$row_recordsetName['ColumnName'] ."" != NULL) { ?>
it's not null
<?php } else { ?>
It's Null
<?php { ?>
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.