function display(id) {
  if (document.getElementById) 
    var elem = document.getElementById(id); 
  else {
    if (document.all ) 
      var elem = document.all[ id ]; 
    else 
      var elem = new Object();
  }
  if (!elem )  
    return; 
  if (elem.style ) 
    elem = elem.style;
  if (typeof( elem.display ) == 'undefined' && !(window.ScriptEngine && ScriptEngine().indexOf( 'InScript' ) + 1)) { 
    window.alert( 'Hidden does not work in this browser.' ); 
    return; 
  }
  if (elem.display == 'none') 
    elem.display = 'block';
  else 
    elem.display = 'none';
}