I don't really see much difference between IE6 and Firefox 1.5.07.
I've also just done (half an hour ago as your site could do with it) an update to Collapso that will reduce the size of the section_tree files by about half.
Here is what to do.
Edit Act_Primary.html (back it up first)
Look for the line
<!--@act NETQUOTEVAR:SECTIONTREE_RAW -->
replace this with
NETQUOTEVAR:SECTIONTREE_NAMES
NETQUOTEVAR:SECTIONTREE_URLS
and look for the line
document.write(YahooSections(section_tree));
which should be changed to
document.write(YahooSections(section_tree_names, section_tree_URLs));
Edit collapso-4.js (back it up first) and replace from the line (inclusive)
function YahooSections(ar){
down to the end of the file with
function YahooSections(arN,arU){
var strIDs = '<table class="toptable" width="100%" cellpadding="0" cellspacing="0" border="0">';
for (var i=0; i < arN.length; i++)
{ // main FOR
var covspace = i == 0 ? '' : cobetween;
if (arN[i+1].pChild)
{ // top has CHILD
strIDs += '<tr id="Item' + i + '" class="showObject"><td>' + covspace;
if ( iconactive )
{
ls = '';
l1 = '<a href="javascript:showSubMenu(' + i + ')">' + topwithchildclosed + '</a>';
l2 = '<a href="' + arU[i+1].sURL + '"><span class="topclosed">' + arN[i+1].sName + '</span></a>';
le = '';
}
else
{
ls = '<a href="javascript:showSubMenu(' + i + ')">';
l1 = topwithchildclosed;
l2 = '<span class="topclosed">' + arN[i+1].sName + '</span>';
le = '</a>';
}
strIDs += iconfirst ? ls + l1 + iconseparator + l2 + le : ls + l2 + iconseparator + l1 + le;
strIDs + '</td></tr>';
strIDs += '<tr id="Header' + i + '" class="hideObject"><td>' + covspace + '';
if ( iconactive )
{
ls = '';
l1 = '<a href="javascript:hideSubMenu(' + i + ')">' + topwithchildopen + '</a>';
l2 = '<a href="' + arU[i+1].sURL + '"><span class="topopen">' + arN[i+1].sName + '</span></a>';
le = '';
}
else
{
ls = '<a href="javascript:hideSubMenu(' + i + ')">';
l1 = topwithchildopen;
l2 = '<span class="topopen">' + arN[i+1].sName + '</span>';
le = '</a>';
}
strIDs += iconfirst ? ls + l1 + iconseparator + l2 + le : ls + l2 + iconseparator + l1 + le;
strIDs += '</td></tr>';
strIDs += '<tr id="SubMenu' + i + '" class="hideObject">'
+ '<td><table class="subtable" width="100%" cellpadding="0" cellspacing="0" border="0">';
for (var j=1; j <= arN[i+1].pChild.length; j++)
{ // each CHILD
var subcovspace = j == 1 ? '' : subcobetween;
if (arN[i+1].pChild[j].pChild)
{ // child has SUB
strIDs += '<tr id="SubItem' + i + '-' + j + '" class="showObject"><td>' + coindent;
if ( iconactive )
{
ls = '';
l1= '<a href="javascript:showSubSubMenu(' + i + ',' + j + ')">' + subwithchildclosed + '</a>';
l2 = '<a href="' + arU[i+1].pChild[j].sURL + '"><span class="subtopclosed">' + arN[i+1].pChild[j].sName + '</span></a>';
le = '';
}
else
{
ls = '<a href="javascript:showSubSubMenu(' + i + ',' + j + ')">';
l1= subwithchildclosed;
l2 = '<span class="subtopclosed">' + arN[i+1].pChild[j].sName + '</span>';
le = '</a>';
}
strIDs += iconfirst ? ls + l1 + iconseparator + l2 + le : ls + l2 + iconseparator + l1 + le;
strIDs += '</td></tr>';
strIDs += '<tr id="SubHeader' + i + '-' + j + '" class="hideObject"><td>' + subcovspace + coindent
if ( iconactive )
{
ls = '';
l1 = '<a href="javascript:hideSubSubMenu(' + i + ',' + j + ')">' + subwithchildopen + '</a>';
l2 = '<a href="' + arU[i+1].pChild[j].sURL + '"><span class="subtopopen">' + arN[i+1].pChild[j].sName + '</span></a>';
le = '';
}
else
{
ls = '<a href="javascript:hideSubSubMenu(' + i + ',' + j + ')">';
l1 = subwithchildopen;
l2 = '<span class="subtopopen">' + arN[i+1].pChild[j].sName + '</span>';
le = '</a>';
}
strIDs += iconfirst ? ls + l1 + iconseparator + l2 + le : ls + l2 + iconseparator + l1 + le;
strIDs += '</td></tr>';
strIDs += '<tr id="SubSubMenu' + i + '-' + j + '" class="hideObject">'
+ '<td><table class="subsubtable" width="100%" cellpadding="0" cellspacing="0" border="0">';
for (var k=1; k <= arN[i+1].pChild[j].pChild.length; k++)
{ // each SUB SUB
if (arN[i+1].pChild[j].pChild[k].pChild)
{
strIDs += '<tr><td>' + subcoindent + '<a href="' + arU[i+1].pChild[j].pChild[k].sURL + '">'
+ '<span class="subsubwchild">' + arN[i+1].pChild[j].pChild[k].sName + subsubwithchild + '</span></a></td></tr>';
}
else
{
strIDs += '<tr><td>' + subcoindent + '<a href="' + arU[i+1].pChild[j].pChild[k].sURL + '">'
+ '<span class="subsubnochild">' + arN[i+1].pChild[j].pChild[k].sName + subsubwithnochild + '</span></a></td></tr>';
}
} // each SUB SUB
strIDs += '</table>' + subsubend + '</td></tr>';
} // child has SUB
else
{ // child has SUB
strIDs += '<tr id="SubItem' + j + '"><td>' + coindent;
l1 = subwithnochild;
l2 = '<a href="' + arU[i+1].pChild[j].sURL + '"><span class="subnochild">' + arN[i+1].pChild[j].sName + '</span></a>'
strIDs += iconfirst ? l1 + iconseparator + l2 : l2 + iconseparator + l1;
strIDs += '</td></tr>';
} // child has SUB
} // each CHILD
strIDs += '</table>' + subend + '</td></tr>';
} // top has CHILD
else
{ // top has CHILD
strIDs += '<tr id="Item' + i + '" class="showObject"><td>' + covspace
l1 = topwithnochild;
l2 = '<a href="' + arU[i+1].sURL + '"><span class="topnochild">'+ arN[i+1].sName + '</span></a>'
strIDs += iconfirst ? l1 + iconseparator + l2 : l2 + iconseparator + l1;
strIDs += '</td></tr>';
} // top has CHILD
strIDs += '</tr>'
} // main FOR
strIDs += '</table>';
return strIDs;
}
// author - see www.drillpine.biz/actinicstuff
// END Collapsing Menu Replacement for YahooSections
Email me and I'll send you the full copy of the updated patch.