Noticed how the instructions to install your Comodo SSL certificate flags an error when you flick onto HTTPS? The way to fix this is to employ the following for both the :

<script language=”JavaScript” type=”text/javascript”>
var comodohost = ((“https:” == document.location.protocol) ? “https://” : “http://”);
COT(comodohost + “www.yourdomain.tld/cot.gif”, “SC2″, “none”);
</script>

<script type=”text/javascript”>
var comodohost = ((“https:” == document.location.protocol) ? “https://” : “http://”);
TrustLogo(comodohost+”www.yourdomain.tld/tl_white.gif”, “SC4″, “none”);</script>

Note the new comodohost variable being used to provide either the HTTPS or HTTP connection.