Three layer dynamic down menu examples for your reference!

Write a three-level dynamic Read folder Drop-down menu examples for your reference!
<%
' Get the folder path. Note Setting the file name
Urlpath=server.mappath ("Ook")
Set Fsobrowse=createobject ("Scripting.FileSystemObject")
' Set folder path
If Request ("path") = "" Then
lpath=urlpath& ""
Else
Lpath=request ("path") & ""
End If
%>
<meta http-equiv= "Content-type" content= "text/html; charset=gb2312 ">
<meta Http-equiv=pragma content=no-cache>
<title> China International Airlines </title>
<link rel= "stylesheet" href= "News.css" >
<script language= "JavaScript1.2" >
NS4 = (document.layers)? 1:0;
IE4 = (document.all)? 1:0;
Ver4 = (NS4 | | IE4)? 1:0;
if (ver4) {
With (document) {
Write ("<style type= ' text/css ' >");
if (NS4) {
Write (". parent {Position:absolute; Visibility:visible} ");
Write (". Child {Position:absolute; Visibility:visible} ");
Write (". regular {Position:absolute; Visibility:visible} ")
}
else {
Write (". Child {Display:none}")
}
Write ("</STYLE>");
}
}
function GetIndex (EL) {
IND = NULL;
For (i=0 i<document.layers.length; i++) {
Whichel = Document.layers[i];