function show_submenu(id){
	
	if(document.getElementById(id).style.display=='none'){
	
		document.getElementById(id).style.display='block';
	
	}
	else{
		
		document.getElementById(id).style.display='none';
		
	}
}
function add_to_favorite(url,title){

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