/* ページをすべて読み込むまで待機 */
window.onload = function(){
	/* エレメントの取得 */
	var root = document.getElementById('leftMenuList');
	var ul  = root.getElementsByTagName('ul');
	var img  = root.getElementsByTagName('img');
	
	/* 全部閉じる */
	for(i = 0; i < ul.length; i++){
		img[i].src = '../images/listy-style.gif';
		ul[i].alt = '開く';
		ul[i].style.display = 'none';
	}
	
	/* イベントリスナーのセット */
	for(i = 0; i < img.length; i++){
		addListener(img[i], "click",closeList);
	}
}
/* イベントリスナー */
function addListener(eventTarget, eventType, eventListener)
{
	if(eventTarget.addEventListener){
		eventTarget.addEventListener(eventType, eventListener, false);
	}else if(eventTarget.attachEvent){
		eventTarget.attachEvent("on"+eventType, eventListener);
	}
}

/* close/open list */
function closeList(e){
	if(window.event){
		var eventObject = e.srcElement;
	}else{
		var eventObject = e.target;
	}
	
	
	
	var childLi = eventObject.parentNode.parentNode;
	var childUl = childLi.getElementsByTagName('ul');
	if(childUl[0].style.display == 'none'){
		eventObject.src = '../images/listy-style2.gif';
		eventObject.alt = '閉じる';
		childUl[0].style.display = 'block';
	}else{
		eventObject.src = '../images/listy-style.gif';
		eventObject.alt = '開く';
		childUl[0].style.display = 'none';
	}
}