We've tested it in every browser, so it should work. Note that EJEJC_multiAdd() is a function of our box.js cart script, so this will only work in pages where you have at least included the SCRIPT portion of our View Cart code:
<script language="javascript" type="text/javascript">
<!--
function EJEJC_lc(th) { return false; }
// -->
</script>
<script src="http://www.e-junkie.com/ecom/box.js" type="text/javascript"></script>
If that doesn't address the problem, please provide the URL of a page where multiAdd isn't working, so we could have a look there for ourselves to see what the problem might be in that particular case.
