function showItem(id) {
//	hide all answers
	var last = document.form1.maxid.value;
	for(var i = 1; i <= last; i++) {
		var z = 'box_'+i;
		document.getElementById(z).style.display = "none";
		}
	var item = document.getElementById(id);
	item.style.display = "block";
	}
function hideItem(id) {
	var item = document.getElementById(id);
	item.style.display = "none";
	}