store-dojo sample doesn't work in IE

The store-dojo sample doesn't work in internet explorer. I've also had a report that it doesn't work with HtmlUnit.

IE complains that an object is expected at line 21, which is where tuscany.AtomService is first used.
tuscany.sca.referenceMap.shoppingCart = new tuscany.AtomService("/ShoppingCart/Cart");

Firefox and Safari seem to be ok, though the contents of the shopping cart does not show up.