jq无限极树结构

//群组树结构
$(function () {
    var params=  { "companyId":cmpId };
    var loadUrl="/apiv2/classify/createBuildClassifyTree";
    console.log(params);
    $.ajaxSend(loadUrl,params,sessionId,cmpId).done(function(data){
        console.log(JSON.stringify(data));
        if (data.code=="00000000"){
            $('.noData').hide();
            var data1=data.payload.results.dataLists;
            /*递归实现获取无级树数据并生成DOM结构*/
            var str = "";
            var forTree = function(o){
                for(var i=0;i<o.length;i++){
                    var urlstr = "";
                    try{
                        if(typeof o[i]["subClassify"] == "undefined"){
                            urlstr = "<div><span>"+ o[i]["name"] +"</span><ul style='background: none'>";
                        }else{
                            urlstr = '<div><span><i class='+ o[i]["subClassify"] +'>'+ o[i]['name'] +'</i></span><ul style="background: none">';
                        }
                        str += urlstr;
                        if(o[i]["subClassify"] != null){
                            forTree(o[i]["subClassify"]);
                        }
                        str += "</ul></div>";
                    }catch(e){}
                }
                return str;
            };
            /*添加无级树*/
            document.getElementById("menuTree").innerHTML = forTree(data1);
            /*树形菜单*/
            var menuTree = function(){
                //给有子对象的元素加[+-]
                $("#menuTree ul").each(function(index, element) {
                    var ulContent = $(element).html();
                    var spanContent = $(element).siblings("span").html();
                    if(ulContent){
                        $(element).siblings("span").html("<img src='../../../media/images/show_tree.png' style='vertical-align: middle'/> " + spanContent)
                    }
                });
                $("#menuTree").find("div span").click(function(){
                    var ul = $(this).siblings("ul");
                    var spanStr = $(this).html();
                    var spanContent = spanStr.substr(78,spanStr.length);
                    if(ul.find("div").html() != null){
                        if(ul.css("display") == "none"){
                            ul.show(300);
                            $(this).html("<img src='../../../media/images/show_tree.png' style='vertical-align: middle'/> " + spanContent);
                        }else{
                            ul.hide(300);
                            $(this).html("<img src='../../../media/images/hide_tree.png' style='vertical-align: middle'/> " + spanContent);
                        }
                    }
                })
            }()
        }else {
//                layer.msg("加载失败，请重试！",{
//                    time:2000
//                });
            //$('.noData').show();
        }
    });
});