Hi,
I have problem with big image in detail products window.
The big image is opened as a background.
http://becart.ba/v2/component/virtuemart/belenzuke/belenzuka-detail?Itemid=0
What's wrong?
Quickest solution - add this to your CSS:
.main-image img {max-width: 300px !important; max-height: 400px !important;}
In general - it seems that You don't have any image resizer plugin installed in Your shop.
Look in Joomla extension portals - there are lot of commercial and non-commercial ones. As long as solution I gave above will work for all browsers including IE7+, image resizer plugin is must-have to reduce loading time of Your shop.
Already answered here: http://forum.virtuemart.net/index.php?topic=103847.msg345204#msg345204
My recommended solution with max-width instead of width is bit better - it allows smaller images to keep their apperance undistorted.