var movieName = "navFlash";

function thisMovie(movieName) {
  if (navigator.appName.indexOf ("Microsoft") !=-1) {
    return window[movieName]
  } else {
    return document[movieName]
  }
}

function movieIsLoaded (theMovie) {
  if (typeof(theMovie) != "undefined") {
    return theMovie.PercentLoaded() == 100;
  } else {
    return false;
  }
}

function purgeNav() {
  if (movieIsLoaded(thisMovie(movieName))) {
    thisMovie(movieName).TCallFrame("/", 1);
  }
}