Welcome to Javascript

setTimeout and window.status:

<script>

  function TimeUntilWawasan2020() {
    various commands to calculate how many seconds until the year 2020;
  }

  function SetStatus(x) {
    window.status = "Only " + x + " seconds until the year 2020!!!" ;  // This sets the status
    x = x - 1;                            
    command = "SetStatus(" + x + ");" ;     // This prepares to set the status again with a
    setTimeout(command,1000) ;              //   new value of x in one second's time.
  }

  x = TimeUntilWawasan2020();     // Find out how long until the year 2020
  SetStatus(x);           // Set the status bar to show that number.

</script>

Thanks for coming!