<!-- Create an event handler for buffering. -->

   var idI; // Variable for the interval id.

   // Test whether buffering has started or stopped.
   if (true == Start){ 
      // Start the timer. Call the function to update the display every second.
      idI = window.setInterval("UpdateBP()", 1000);
   }

   else{
      // Buffering is complete. Stop the timer.
      window.clearInterval(idI);
   }