function showanswer(question){
	id = question.id;
	number = id.substring(1);
	answerid = "a" + number;
	answer = document.getElementById(answerid);
	if (answer.style.display == 'none' || answer.style.display == ''){
		answer.style.display = 'block';
		}
	else{
		answer.style.display = 'none';
		}
	}