function bookmark(url,title){
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  window.external.AddFavorite(url,title);
  } else if (window.sidebar && window.sidebar.addPanel) {
    window.sidebar.addPanel(title,url,"");
  } else {
    alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
  }
}

function changeDisplay(off, on) {
	if (off && off != ""){ 
		document.getElementById(off).style.display = 'none';
		}
	if (on && on != ""){
		document.getElementById(on).style.display = 'block';
		}
	return true;	
}