function toggleExcerpt(o) {
  var bqNode = o.parentNode.nextSibling;
  while (bqNode.className != "hidden") {
    bqNode = bqNode.nextSibling;
  }
  if (bqNode.style.display == "none" || bqNode.style.display == "") {
    bqNode.style.display = "block";
	o.innerHTML = '<< 詳細を隠す';
  } else {
    bqNode.style.display = "none";
	o.innerHTML = '>> 詳細を見る';
  }
}