I have read through some old threads, and I cant figure out what the problem is with my shopping cart. My cart is www.worldwidejanitor.com. When you have items in the shopping cart, the little "refresh" button arrows (update qty) link doesn't seem to do anything.

I have already checked the product details settings, and the max number of items is set to unlimited on all products. Also Products Quantity Box Shows:
"Yes, Show Quantity Box."

Any ideas what could be causing this?