var j$ = jQuery;

j$(function(){
	j$(".nav").each(function(){
		j$("li > a", this).each(function(index){
			var $this = j$(this);
				if(index >= 0) $this.next().hide();
				$this.click(function(){
				var params = {height:"toggle", opacity:"toggle"};
				j$(this).next().animate(params).parent().siblings()
				.children("ul:visible").animate(params);
				return false;
			});
		});
	});
});