This is actually one of Peter Allen's tools he deployed for us but I will explain what I understand so far. He is building a combobox of lists/libraries on a site using getlistcollection. He is relying on async to be able to build the list in a function. Due to the async, the remainder of the calling function gets a parameter from the url params to identify which list should be already selected before the completefunc actually executes. I hope that makes enough sense. I'd post code but it's not fully mine to post.
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