var isNav = false, isIE = false, isWebTV = false ;

if( navigator.appName.indexOf("WebTV") != -1 ) {
  isWebTV = true ;
}
else if( navigator.appName.indexOf( "Microsoft" ) != -1 ) {
  isIE = true ;
}
else {
  isNav = true ;
}

function setMsg( msg ) {
  window.status = msg ;
  return true ;
}
function noMsg() {
  window.status = '' ;
  return true ;
}