请教哪里有jsp中三级树形菜单的源代码？

<html>
<head>
<script language="JavaScript1.2">
scores = new Array(20);
var numTotal=0;
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];
if (whichEl.id == el)
{
ind = i;
break;
}
}
return ind;
}
function arrange()
{
nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
for (i=firstInd+1; i<document.layers.length; i++)
{
whichEl = document.layers[i];
if (whichEl.visibility != "hide")
{
whichEl.pageY = nextY;
nextY += whichEl.document.height;
}
}
}
function initIt()
{
if (!ver4) return;
if (NS4)
{
for (i=0; i<document.layers.length; i++)
{
whichEl = document.layers[i];
if (whichEl.id.indexOf("Child") != -1)
whichEl.visibility = "hide";
}
arrange();
}
else
{
divColl = document.all.tags("DIV");
for (i=0; i<divColl.length; i++)
{
whichEl = divColl(i);
if (whichEl.className == "child")
whichEl.style.display = "none";
}
}
}
function expandIt(el)
{
if (!ver4)
    return;
if (IE4)
{
whichEl1 = eval(el + "Child");
for(i=1;i<=numTotal;i++)
{
whichEl = eval(scores[i] + "Child");
if(whichEl!=whichEl1)
{
whichEl.style.display = "none";
}
}
whichEl1 = eval(el + "Child");
if (whichEl1.style.display == "none")
{
whichEl1.style.display = "block";
}
else
{
whichEl1.style.display = "none";
}
}
else
{
whichEl = eval("document." + el + "Child");
for(i=1;i<=numTotal;i++)
{
whichEl = eval("document." + scores[i] + "Child");
if(whichEl!=whichEl1)
{
whichEl.visibility = "hide";
}
}
if (whichEl.visibility == "hide")
{
whichEl.visibility = "show";
}
else
{
whichEl.visibility = "hide";
}
arrange();
}
}onload = initIt;
</script>
</head>

解决方案 »

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