title: Is there a viewstate event before postback?
body: <p>Consider the following: A text value added to a textbox on the client is added to viewstate on postback (thus the value is still present in the textbox when the page has reloaded).</p>
  
  <p>How come when I move a value from listbox1 to listbox2 via jquery the items in listbox2 are not added to viewstate. (note: the items are selected before POST and the values in listbox2 are available on the server on postback via request.form.getvalues("listbox2").getvalue(index).tostring())</p>
  
  <p>I'm not looking for a work around, I've got that. I'm want to know "why" the listbox2 values are not added. Is there some event being fired for the textbox but not the listbox?  Just trying to better understand what's going on. Thanks!</p>