Вот уже другая страница, но с теми же проблемами...
<head>
<meta http-equiv="Content-Type" content="text/html; charset=win-1251" />
<link rel="stylesheet" href="files/1.css" type="text/css" />
<link rel="stylesheet" href="files/2.css" type="text/css" />
<link rel="stylesheet" href="files/3.css" type="text/css" />
<link rel="stylesheet" href="files/4.css" type="text/css" />
<link rel="stylesheet" href="files/5.css" type="text/css" />
<link rel="stylesheet" href="files/6.css" type="text/css" />
<link rel="stylesheet" href="files/7.css" type="text/css" />
<link rel="stylesheet" href="files/8.css" type="text/css" />
<link rel="stylesheet" href="files/9.css" type="text/css" />
<style>
<!--
#foldheader{cursor:hand ; font-weight:bold ;
list-style-image:url(fold.gif)}
#foldinglist{list-style-image:url(list.gif)}
//-->
</style>
<script language="JavaScript1.2">
var head="display:''"
img1=new Image()
img1.src="fold.gif"
img2=new Image()
img2.src="open.gif"
var ns6=document.getElementById&&!document.all
function change(e){
if (!document.all&&!ns6)
return
var etarget=ns6?e.target:event.srcElement
var imagetarget=etarget
if (etarget.id=="foldheader"||ns6&&etarget.parentNode.id=="foldheader"){
if (ns6&&etarget.parentNode.id=="foldheader"){
nested=etarget.parentNode.nextSibling.nextSibling
imagetarget=etarget.parentNode
}
else
nested =ns6?etarget.nextSibling.nextSibling:document.all[etarget.sourceIndex+1]
if (nested.style.display=="none") {
nested.style.display=''
imagetarget.style.listStyleImage="url(open.gif)"
}
else {
nested.style.display="none"
imagetarget.style.listStyleImage="url(fold.gif)"
}
}
}
document.onclick=change
//-->
</script>
</head>
<div align="left"><p class="articleinfo"><ul>
<li id="foldheader">Topic 1</li>
<ul id="foldinglist" style="display:none" style=&{head};>
<li><a href="topics/topic1/lessons/lesson1/lesson.html" target="main">Lesson 1</a></li>
<li><a href="topics/topic1/lessons/lesson2/lesson.html" target="main">Lesson 2</a></li>
<li><a href="topics/topic1/lessons/lesson3/lesson.html" target="main">Lesson 3</a></li>
</ul>
</ul>
</body>
</html>