var questions = document.getElementsByTagName('blockquote');

function showhide(e)
{
	var reveal = (document.getElementById(e).style.display == 'none') ? 'block' : 'none';
	document.getElementById(e).style.display = reveal;
}

function showhideall(cb)
{
	for (var j = 0; j < questions.length; j++)
	{
		var revealall = (cb.checked) ? 'block' : 'none';
		questions[j].style.display = revealall;
	}
}