1.建立一个aspx页面
html代码
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>小山</title>
<link type="text/css" href="../../Styles/tree_css/tree.css" rel="stylesheet">
</head>
<body>
<form id="Form1" runat="server">
<table width=100% cellpadding=0 cellspacing=0 border=0>
<colgroup>
<col width=180 />
<col />
</colgroup>
<tr>
<td>
<div class="TreeMenu" id="CategoryTree" style="width: 100%; height: 489px">
</div>
</td>
<td>
<iframe id=furl height=20 style="height: 497px; width: 100%;"></iframe>
</td>
</tr>
</table>
<script language="jscript">
function el(id)
{
return document.getElementById(id);
}
function ExpandSubCategory(iCategoryID)
{
var li_father = el("li_" + iCategoryID);
if (li_father.getElementsByTagName("li").length > 0) //分类已下载
{
ChangeStatus(iCategoryID);
return;
}
li_father.className = "Opened";
switchNote(iCategoryID, true);
AjaxMethod.GetSubCategory(iCategoryID, GetSubCategory_callback);
}
function GetSubCategory_callback(response)
{
var dt = response.value.Tables[0];
if (dt.Rows.length > 0)
{
var iCategoryID = dt.Rows[0].FatherID;
}
var li_father = el("li_" + iCategoryID);
var ul = document.createElement("ul");
for (var i = 0;i < dt.Rows.length;i++)
{
if (dt.Rows[i].IsChild == 1) //叶子节点
{
var li = document.createElement("li");
li.className = "Child";
li.id = "li_" + dt.Rows[i].CategoryID;
var img = document.createElement("img");
img.id = dt.Rows[i].CategoryID;
img.className = "s";
img.src = "../../Styles/tree_css/s.gif";
var a = document.createElement("a");
var id = dt.Rows[i].CategoryID;
a.onmouseover = function()
{
PreviewImage(id);
};
a.href = "javascript:OpenDocument('" + dt.Rows[i].CategoryID + "');";
a.innerHTML = dt.Rows[i].CategoryName;
}
else
{
var li = document.createElement("li");
li.className = "Closed";
li.id = "li_" + dt.Rows[i].CategoryID;
var img = document.createElement("img");
img.id = dt.Rows[i].CategoryID;
img.className = "s";
img.src = "../../Styles/tree_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].CategoryID + ");";
a.innerHTML = dt.Rows[i].CategoryName;
}
li.appendChild(img);
li.appendChild(a);
ul.appendChild(li);
}
li_father.appendChild(ul);
switchNote(iCategoryID, false);
}
// 叶子节点的单击响应函数
function OpenDocument(iCategoryID)
{
// 预加载信息
PreloadFormUrl(iCategoryID);
}
function PreviewImage(iCategoryID)
{
}
function ChangeStatus(iCategoryID)
{
var li_father = el("li_" + iCategoryID);
if (li_father.className == "Closed")
{
li_father.className = "Opened";
}
else
{
li_father.className = "Closed";
}
}
function switchNote(iCategoryID, show)
{
var li_father = el("li_" + iCategoryID);
if (show)
{
var ul = document.createElement("ul");
ul.id = "ul_note_" + iCategoryID;
var note = document.createElement("li");
note.className = "Child";
var img = document.createElement("img");
img.className = "s";
img.src = "../../Styles/tree_css/s.gif";
var a = document.createElement("a");
a.href = "javascript:void(0);";
a.innerHTML = "请稍候";
note.appendChild(img);
note.appendChild(a);
ul.appendChild(note);
li_father.appendChild(ul);
}
else
{
var ul = el("ul_note_" + iCategoryID);
if (ul)
{
li_father.removeChild(ul);
}
}
}
// 加载根节点
var tree = el("CategoryTree");
var root = document.createElement("li");
root.id = "li_0";
tree.appendChild(root);
// 加载页面时显示第一级分类
ExpandSubCategory(0);
function PreloadFormUrl(iCategoryID)
{
// 采用同步调用的方式获取图片的信息
var ds = AjaxMethod.GetFormsList(iCategoryID).value;
// 如果返回了结果
if (ds)
{
// 判断数据表是否不为空
if (ds.Tables[0].Rows.length > 0)
{
// 返回的信息数据表
dt = ds.Tables[0];
el("furl").src = dt.Rows[0].FormUrl;
}
else // 分类下没有
{
}
}
}
</script>
</form>
</body>
</html>