js递归方法创建节点

var jsonData =
            [{"subnetId":1,"subnetNode":-1,"subnetRemark":"状态自带","subnetName":"中心网络"},
                {"subnetId":2,"subnetNode":1,"subnetRemark":"好好的","subnetName":"北京"},
                {"subnetId":3,"subnetNode":1,"subnetRemark":"大唐电信","subnetName":"大唐电信"},
                {"subnetId":4,"subnetNode":1,"subnetRemark":"","subnetName":"上海"},
                {"subnetId":5,"subnetNode":4,"subnetRemark":"","subnetName":"中国联通"},
                {"subnetId":6,"subnetNode":3,"subnetRemark":"","subnetName":"移动"},
                {"subnetId":7,"subnetNode":2,"subnetRemark":"","subnetName":"你好"}];

有数组如上，用递归的方式实现一下效果，

subnetId与subnetNode相等时，subnetId作为父节点，subnetNode作为子节点

 function show(data,node){
        var ul = "<ul>";
        for(var i=0;i<data.length;i++){
           if(data[i]!=null){
               if(data[i].subnetNode==node){
                   ul += "<li style='margin-left:10px;'>"+data[i].subnetName;
                   ul += show(data,data[i].subnetId);
                   ul += "</li>";
               }
           }
        }
        ul+="</ul>";
        return ul;
    }
    var a = show(jsonData,-1);
    console.log(a);
    var div = document.createElement(div);
    div.innerHTML = a;
    document.body.appendChild(div);