Thanks for the feedback. You are totally right about the forms collection. I never got around to fixing that from my test page. As for the sorts not queuing, I’d be interested if you could email me the page you are using. I think you must be getting an error from something else that is precluding the javascript from running.

Your example will capture, store, and correctly re-call _dopostback, but I feel like something is missing here because while the queued requests are sent and received, only the first request will actually be updated by the browser. For example, say I had a gridview inside of an updatepanel control with two sortable columns and I clicked on the first column header (to initiate a postback that will do the sort) and then the second (queueing the 2nd request). The first request will complete like normal and the the second will be issued, but even though a response is sent back from the server the browser never actually displays the changes made to the contents of the updatepanel. Any ideas?

As an aside, one (rather obvious) thing worth noting:

On the following line
argsQue.push(document.form1.__EVENTARGUMENT.value);
should be something like
argsQue.push(document.forms[0].__EVENTARGUMENT.value);
(assuming that you only have one form on the page holding your controls)