csdn 左侧树型列表的实现原理是怎么的

Question

csdn 左侧树型列表的实现原理是怎么的？？？请大家参与讨论

Answer 1

    <meta content="http://community.csdn.net/tree/f.r.huang(meizz梅花雪)//www.meizz.com" name="author">
    <script language="javascript" src="http://community.csdn.net/tree/mztreeview10.js"></script>
    <script language="javascript" src="http://community.csdn.net/tree/TreeNodeData/begin.js"></script> <script language="javascript">
    <!--
    var tree = new MzTreeView("tree");
    tree.setIconPath("http://community.csdn.net/Tree/TreeImages/");
    tree.url = "http://community.csdn.net/Expert/ForumList.asp?typenum=1";
    tree.target = "ContentFrame";
    tree.nodeFilePath = "http://community.csdn.net/Tree/TreeNodeData/";
    InitShowTreeInfo(tree);
    document.getElementById('treeviewarea').innerHTML = tree.toString();
    //-->
    </script>

Answer 2

原理: 
this.XMLHttpLoadFile = function(url,id) 
    {
        var httpRequest;
        if (typeof XMLHttpRequest != 'undefined') {
            httpRequest = new XMLHttpRequest();
        }
        else if (typeof ActiveXObject != 'undefined') {
            httpRequest = new ActiveXObject('Microsoft.XMLHTTP');
        }
        if (httpRequest) {
            httpRequest.open('GET', url, false);
            httpRequest.send(null);
            if(httpRequest.status == 200)
            {
                var textInfo = httpRequest.responseText;
                eval(textInfo);
            }
        }
    }
即时读取并, 解析javascript脚本