//アコーディオン

$(function(){
$("#menu").each(function(){
$("li > span.function-title", this).each(function(navilist){
var $this = $(this);
if(navilist > 0) $this.next().hide();

$this.click(function(){
var params = {height:"toggle", opacity:"toggle"};
$(this).next().animate(params).parent().siblings().children("ul:visible").animate(params);
return false;
});
});
});
});