>Ahhh.. the old "Click once or you'll be charged multiple times". Disable the option. Update the UI. Enable the option.

Yes, this is exactly what I have been working on since I posted this message. So, wherever a function applies, I have something like this:

function Skip()
{
   if (loDiv)
   {
      loDiv.disabled=true
   }
   ...
}

This is an example from one function. What I like about this is that during the processing time of the round trip to the server, which is launched at the end of the Skip() function, I see my entire DIV get greyed out. And, then it reappears updated. So, I like that better than to make it disappear and reappear. The later option is more like a blink. Having it disabled shows that something is in process, additionnally to the browser circling processing object, and in a fraction of a section, an update is being done.