上面的功能有点缺陷(ques1:多行时候不能折叠，默认只折叠第一行;ques2:不支持IE)，现在改善如下：
- <script type="text/javascript"> function showmenu(id)
- { var smallimg = document.getElementById("smallimg"+id);
- var img = document.getElementById("img"+id); if(smallimg.style.display =="none")
- { smallimg.style.display="";
- img.src="Image/tree_folder3.gif";//显示为- }
- else {
- smallimg.style.display ="none"; img.src="Image/tree_folder4.gif";//显示为+
- } }
- </script>
- <body> <form id="Form1" method="post" runat="server">
- <font face="宋体"></font> <table width="679" height="100%" border="0" cellpadding="0" cellspacing="0" align="center">
- <tr> <td align="center" valign="top">
- <strong>版 块设 置</strong> <br />
- <br /> 管理选项：<asp:Button ID="btnAdd" runat="server" OnClick="btnAdd_Click" Text="添加一级版块"/><br />
- <br /> <asp:DataList ID="DataList1" runat="server" CellSpacing="0" CellPadding="0" Width="679"
