javascript实现目录树
<html>
<head>
<style>
<!--
#roothead{cursor:hand ; font-weight:bold ;
list-style-image:url(top.gif)}
#foldinglist{list-style-image:url(list.gif)}
//-->
</style>
<script language="JavaScript1.2">
<!--
var head="display:''"
img1=new Image()
img1.src="top.gif"
img2=new Image()
img2.src="open.gif"
function change()
{
if(!document.all)
{
return;
}
if (event.srcElement.id=="roothead")
{
var srcIndex = event.srcElement.sourceIndex
var secondhead = document.all[srcIndex+1]
if (secondhead.style.display=="none")
{
secondhead.style.display=''
event.srcElement.style.listStyleImage="url(open.gif)"
}
else
{
secondhead.style.display="none"
event.srcElement.style.listStyleImage="url(top.gif)"
}
}
}
document.onclick=change;
//-->
</script>
</head>
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