function openMenu(menuID,contentsID){
	var menu = gid(menuID);
	var contents = gid(contentsID);
	
	for(var i=0;i<menu.parentNode.getElementsByTagName("li").length;i++){
		var obj=menu.parentNode.getElementsByTagName("li")[i];
		obj.style.backgroundColor="#e5e5e5";
		obj.style.fontWeight="normal";
	}	
	menu.style.backgroundColor="#c9c9c9";
	menu.style.fontWeight="bold";
	if(contents){	
		for(var i=0;i<contents.parentNode.getElementsByTagName("li").length;i++){
			var con=contents.parentNode.getElementsByTagName("li")[i];
			con.style.display="none";
		}
		contents.style.display="block";
	}
	else{
		alert("参照先がありません。");
	}
}
function parseQuery(qstr){
	qstr = qstr.replace(/^\?/,'');
	var query = new Array();
	var arr = qstr.split("&");
	for(var i = 0; i < arr.length; i++){
		var str = arr[i].split('=');
		var key = str[0];
		var val = str[1];
		if(key != ''){
			query[key] = val;
		}
	}
	return query;
}
function getOpen(num){
	var query = parseQuery(location.search);
	if(typeof query['menu'] == "undefined" || query['menu'] >= num || !query['menu']) query['menu'] = 0;
	for(var i=0;i<num;i++){
		if(query['menu']==i){
			openMenu('nMenu'+i, 'nContents'+i);
			break;
		}
		else{
			openMenu('nMenu0', 'nContents0');
		}
	}
}

function showSub(id){
	var obj = gid(id);
	obj.style.position="absolute";
	obj.style.display="block";
	obj.style.zIndex=10;
	for(var i=0;i<obj.parentNode.getElementsByTagName("li").length;i++){
		var obj2=obj.parentNode.getElementsByTagName("li")[i];
		obj2.style.backgroundColor="#c9c9c9";
	}	
}
function hideSub(id){
	var obj = gid(id);
	obj.style.display="none";
}