var j$ = jQuery;

j$(function(){
  j$(".acc").each(function(){
    j$("li.list > 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;
      });
    });
  });
});