javascript vs server event conundrum- iOS

[bigbrain]

Ok here is my problem, I've inherited an old ASP.NET 2 website which I've been asked to make iOS capable. My biggest headache so far is that because of the way you have to log into the system right now I need to pass the UserName to the iphone and also run the server Click event. I can do one or the other but not both, and hooking up to the username textbox via either the KeyUp event or the OnChanged event causes other problems with the Objective-C code for the iPhone. Is there anyway that I can update both the phone and the server at basically the same time?Thanks,Blair