求个JS。。。急！！！！！！！

 $(document).ready(function(){ var str=[{caidan:"菜单1",son:[{name:"菜单11",url:"ddd",id:"11"},{name:"菜单12",url:"ddd",id:"12"},{name:"菜单13",url:"ddd",id:"13"}]},
 {caidan:"菜单2",son:[{name:"菜单21",url:"ddd",id:"21"},{name:"菜单22",url:"ddd",id:"22"},{name:"菜单23",url:"ddd",id:"23"}]},
 {caidan:"菜单3",son:[{name:"菜单31",url:"ddd",id:"31"},{name:"菜单32",url:"ddd",id:"32"},{name:"菜单33",url:"ddd",id:"33"}]}]; var str1=$("<div class=\"fristDiv\"></div>").css("width","180px").appendTo("table tr td:nth-child(2)");
var st=$("<ul></ul>").appendTo(str1);
$(str).each(function(cs,ts){
var li=$("<li class=\"hmain\"></li>");
$("<div class=\"er\" ></div>").text(ts.caidan).appendTo(li);
var ul=$("<ul></ul>");
$.each(ts.son,function(ps,pt){
var py=$("<li class=\"san\">"+pt.name+"</li>").attr("id",pt.id).appendTo(ul);
py.click(function(){
$.cookie('id', pt.id, {path: '/'});
window.location.href="../html/javaScript.html";
});
});
ul.appendTo(li);
li.appendTo(st); });


 var _itemid = $.cookie('id');
 if(_itemid){
  $("#"+_itemid).css("background-image","url(../images/z_35.jpg)");
 } $(".hmain").hover(function(){
$(this).children("ul").slideToggle();

},function(){
$(this).children("ul").slideToggle();

});
});