Hi Dirk, Thanks for that information. I suppose this goes back to that earlier discussion about jQuery vs. Mootools in a way. I've got (growing) experience with the former and none with the latter, and have been developing this new plugin using jQuery since that goes with pretty much all of the other JavaScript work I'm doing, hence some of my confusion in working with a blend of the two. If JSPWiki at some point converts over to jQuery my attempts at compatibility with Mootools would at that point need to be updated to jQuery.
We might consider either modifying the JSONRPCManager, either to make it compatible with Mootools or at least document that the non-global methods that reference the nonexistent JSONRpcClient that won't work. Probably that's a low priority, admittedly. For now I'll go ahead and try to implement the AJAX functionality via the method you suggest, so thanks again for being so helpful. Ichiro