To view a larger image of the ZCard, you need to click on the thumbnail. This activates a javascript (techie term for a small program *grin*) which launches a small window in your browser to show you the ZCard.
If you are getting a Javascript Error when you click on the thumbnail, either your browser does not support javascripting (in which case you *really* need a new browser) or you have turned off javascripting on your browser. You must remedy the issue to be able to preview a larger version of the ZCard. This, however, does *NOT* prohibit you from sending a ZCard - just select the one you want and complete the process. Javascripting is only used to view a larger image of the ZCard.
Enjoy your visit to the ZCards @ Zubin.com site.