This works fine for the initial function called by OnClientClick (Play), but that function in turn calls a second function to determine the timing, control the progress bar, and whether or not the player is done playing yet and if so to swap back the original image. In that second function (Timing), I get a null object reference if I try to pass the element in again as an argument.
I have tried getting the id of the element and passing that instead (and then locating the element from the second function with getElementByID), but get the same error.
<eo:ProgressBar ID="ProgressBar1" runat="server" BorderColor="Black" BorderWidth="1px" IndicatorColor="Red" Hei
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