//初期設定用（詳細情報にdisplayプロパティを与える）
function setUp() {
	var moreInfoElmnts = getByClass (document, "moreInfo", "div");
	for (i = 0; 0 < moreInfoElmnts.length; i++ ){
		moreInfoElmnts[i].style.display = "none";
		}
	}
	
//詳細情報の開閉
function moreInfoOpen(obj){
	var moreInfoElmnts = getByClass(obj.parentNode, "moreInfo", "div");
	if (moreInfoElmnts[0].style.display == "none"){
		moreInfoElmnts[0].style.display ="block";
		} else {
			moreInfoElmnts[0].style.display = "none";
			}
		}

//class名から要素を取得
function getByClass (parentElmnt, className, tagName){
	var cElmnts = new Array();
	var elmnts = parentElmnt.getElementsByTagName(tagName);
	for (i=0; i<elmnts.length; i++){
		if (elmnts[i] .className == className){
			cElmnts.push(elmnts[i]);
			}
		}
		return cElmnts;
	}