$(function(){
	$(".toggle").next(".menu").hide();
	$(".toggle").css({"background":"url(http://tk.benesse.co.jp/record/t/images/triangle-close.gif) center left no-repeat"});
	
	$(".toggle").click(function() {
		var status = $(this).next(".menu");
		if (status.css("display") == "none") {
			status.slideDown();
			$(this).css({"background":"url(http://tk.benesse.co.jp/record/t/images/triangle-open.gif) center left no-repeat"});
		} else {
			status.slideUp();
			$(this).css({"background":"url(http://tk.benesse.co.jp/record/t/images/triangle-close.gif) center left no-repeat"});
		}
	});
});