js多级树形弹出一个小窗口层(非常好用)实例代码

// JScript 文件
 var inputID, inputName;
function ExpandSubCategory(iCategoryID, FahterID) {

var li_father = document.getElementById("li_" + iCategoryID);
    if (li_father.getElementsByTagName("li").length > 0) //如果已经加载了下级节点则直接展开，不必在去读取数据
    {
        ChangeStatus(iCategoryID);
        return;
    }

//打开时显示稍等
    switchNote(iCategoryID, true);
    //AJAX回调函数，加载节点    
    used_car.BLL.T_BrandBaby.GetList("dm='品牌' and fID=" + iCategoryID, GetSubCategory_callback);
}
function ExpandSubCategoryAgain(iCategoryID, FahterID) {

var li_father = document.getElementById("li_" + iCategoryID);
    li_father.className = "Opened";
    //打开时显示稍等
    switchNote(iCategoryID, true);
    //AJAX回调函数，加载节点
    used_car.BLL.T_BrandBaby.GetList("dm='品牌' and fID=" + iCategoryID, GetSubCategory_callback);
}
function GetSubCategory_callback(response) {
    var dt = response.value.Tables[0];
    if (dt.Rows.length > 0) {
        var iCategoryID = dt.Rows[0].fID; //父ID
    }
    var li_father = document.getElementById("li_" + iCategoryID);
    var ul_sub = document.getElementById("ulTree_" + iCategoryID);
    if (ul_sub != null) {
        li_father.removeChild(ul_sub)
    }
    var ul = document.createElement("ul");
    ul.id = "ulTree_" + iCategoryID
    for (var i = 0; i < dt.Rows.length; i++) {
        if (used_car.BLL.T_BrandBaby.GetList("dm='品牌' and fID=" + dt.Rows[i].id).value.Tables[0].Rows.length<1)
//       {
//        if (dt.Rows[i].ProductStyle_IsChild == 1) //如果已没有下一级节点
        {
            var li = document.createElement("li");
            li.className = "Child";
            li.id = "li_" + dt.Rows[i].id;

var img = document.createElement("img");
            img.id = dt.Rows[i].id;
            img.className = "s";
            img.src = "../../css/s.gif";

var a = document.createElement("a");
            var id = dt.Rows[i].id;

a.href = "javascript:OpenDocument('" + dt.Rows[i].id + "','" + dt.Rows[i].name + "');";
            a.innerHTML = dt.Rows[i].name.sub(14);
            a.title = dt.Rows[i].name;
        }
        else    //如果还有下级节点
        {
            var li = document.createElement("li");
            li.className = "Closed";
            li.id = "li_" + dt.Rows[i].id;

var img = document.createElement("img");
            img.id = dt.Rows[i].id;
            img.className = "s";
            img.src = "../../css/s.gif";
            img.onclick = function () {
                ExpandSubCategory(this.id);
            };
            img.alt = "展开/折叠";

var a = document.createElement("a");
            a.href = "javascript:ExpandSubCategory(" + dt.Rows[i].id + ",'editCate');";
            a.innerHTML = dt.Rows[i].name.sub(14);
            a.title = dt.Rows[i].name;
        }
        li.appendChild(img);
        li.appendChild(a);
        ul.appendChild(li);
    }
    li_father.appendChild(ul);
    //先显示稍等。。。
    switchNote(iCategoryID, false);
}

// 叶子节点的单击响应函数
function OpenDocument(iCategoryID, Action) {