function r() {
	hidePieces();
}

function s(hyperlink) {
	hyperlink = hyperlink.substring(hyperlink.lastIndexOf('#'));
	hidePieces();
	showPiece(hyperlink);
	return false;
}

function showPiece(id) {
	var piece = document.getElementById(id);
	if (piece) {
		piece.style.display = 'block';
	}
}

function hidePieces() {
	var pieces = document.getElementsByTagName('p');
	for (var i=0; i<pieces.length; i++) {
		var re = new RegExp(/sr/);
		if (pieces[i].className.match(re)) {
			pieces[i].style.display = 'none';
		}
	}
}