$("#delNode").click(function(){
            var selected = document.getElementById($("#TreeView1_SelectedNode").val());//取得选择的节点
            if(selected != null)
            {
                //调用jquery的ajax方法删除节点
                $.ajax({
                type: "get",
                dataType: "text",
                url: "treeview.aspx",
                data: "id=" + $("#selectedvalue").val(),
                success: function(msg){
                        if(msg=="0")//删除成功
                            DelNode(selected);//删除页面上相应的节点
                        else
                            alert(msg);                            
                    }
                });
            }                
            else
                alert("请先选择节点");
                
        });
        
    
    function DelNode(node)
    {
        var subdiv = "#" + node.id.replace("t","n") + "Nodes";//节点的子节点所在div的id
        if($(subdiv).html() == null)//没有子节点
        {
            if($(WebForm_GetParentByTagName(node,"div")).find("table").length == 1)//这个用来判断是否有兄弟节点
            {
                //如果只有一个节点,没有其他兄弟节点的话，就需要把这个节点所在的div一起删掉
                var parentdiv = WebForm_GetParentByTagName(node,"div")
                $(parentdiv).remove();
                $("#" + parentdiv.id.replace("t","n").replace("Nodes","")).parent().html("<img src="/jsonTest/WebResource.axd?d=lBLgNV6VfPf2WYaPivyJeox2LqmFZnR_zUU0BO2r0tM1&amp;t=633087263926406250" alt="" />");//替换父节点的前的图片，把展开的图片换成空白图片
            }
            else
                $(WebForm_GetParentByTagName(node,"table")).remove();//有兄弟节点，只删除节点本身的table
        }
        else
            alert("请先删除子节点");//有子节点的话不能直接删除
    }