Dynamically loading banner with wp-super cache

I’m trying to avoid caching WPAds so that the banners load dynamically. The plugin requires adding the following to my theme file:

<?php wpads(‘sidebar’); ?>

I’ve added the code and have tried adding the dynamic caching tag for the plugin and changing the init value to 1 but still nothing. Any idea how I can load that little bit of PHP code using javascript so it loads dynamically?