in firebug, I see the following error:
Products_Detail_Lookup.php?ProductID=93 301 Moved Permanently
83ms
this points to a probelm in the htaccess rule you are using to redirect http traffic to https.
maybe try changing the following on the products detail paage:
var thepage = "Products_Detail_Lookup.php?GroupingID=<?php echo($row_GroupingRS["GroupingID"]); ?>&Options="+optionsArray.join(",");
to:
var thepage = "https://www.definingapparel.com/Products_Detail_Lookup.php?GroupingID=<?php echo($row_GroupingRS["GroupingID"]); ?>&Options="+optionsArray.join(",");
so that it makes the request using the https protocol.