function next(elem) {
	do {
		elem = elem.nextSibling;
	} while (elem && elem.nodeType != 1);
	return elem;
}
function showHide(a) {
	var nextElem = next(a);

	if (nextElem.className == "") {
		nextElem.className = "answer";
	}
	else if (nextElem.className == "answer") {
		nextElem.className = "";
	}
}