function addBookmark(title,url) { 
if (window.sidebar) { 
	window.sidebar.addPanel(title, url,"");
} else if( document.all ) {
	window.external.AddFavorite( url, title);
} else if( window.opera && window.print ) {
	return true;
}
}


function toggleMenu(book) {
document.getElementById(book).style.visibility = "visible";
document.getElementById(book).style.display = "block";
}