csshover.htc not getting the job done - :hover in <li> tags

I am trying to overcome a difficulty in the site design I have to implement, which is the :hover pseudoclass being used on <li> tags, which doesn't work in IE6.

Unfortunately I can't use the nice_menus module because of the way the design is built.

To correct the issue the designers have provided me with a javascript file which they found on the web. I looked it up and it seems pretty popular. Here is the source :

<attach event="ondocumentready" handler="parseStylesheets" />
<script language="JScript">
/**
 *	HOVER - V1.00.031224 - whatever:hover in IE
 *	---------------------------------------------
 *	Peterned - http://www.xs4all.nl/~peterned/
 *	(c) 2003 - Peter Nederlof
 *
 *	howto: body { behavior:url("csshover.htc"); }
 *	---------------------------------------------
 */

var CSSBuffer, doc = window.document;

function parseStylesheets() {
	var rules, sheet, sheets = doc.styleSheets;
	var bufferIndex = sheets.length;	
	var head = doc.getElementsByTagName('head')[0];
	var buffer = doc.createElement('style');

	buffer.setAttribute('media', 'screen');
	buffer.setAttribute('type', 'text/css');
	head.appendChild(buffer);
	CSSBuffer = sheets[bufferIndex];

	for(var i=0; i<sheets.length -1; i++) {
		sheet = sheets[i];
		if(!sheet.media || sheet.media == 'screen') {
			rules = sheet.rules;
			for(var j=0; j<rules.length; j++) {
				parseCSSRule(rules[j]);
			}
		}
	}
}
	function parseCSSRule(rule) {
		var select = rule.selectorText, style = rule.style.cssText;
		if(!select || !style || select.indexOf(':hover') < 0) return;
		var newSelect = select.replace(/\:hover/g, '.onHover');
		CSSBuffer.addRule(newSelect, style);
		
		var affected = select.replace(/\:hover.*$/g, '');
		var elements = getElementsBySelect(affected);
		for(var i=0; i<elements.length; i++) {
			if(elements[i].nodeName == 'A') continue;
			new HoverElement(elements[i]);
		}
	}

/**
 *	HoverElement
 *	-------------------------
 *	applies the hover
 */

function HoverElement(element) {
	if(element.isHoverElement) return;
	element.isHoverElement = true;
	element.attachEvent('onmouseover', 
		function() { element.className += ' onHover'; });

	element.attachEvent('onmouseout', 
		function() { element.className = element.className.replace(/onHover/g, ''); });
}

/**
 *	domFinder
 *	-----------------------------------
 *	returns list of elements based on css selector
 */

function getElementsBySelect(rule) {
	var nodeList = [doc], sets = rule.split(' ');
	for(var i=0; i<sets.length; i++) {
		nodeList = domFinder.filterNodes(sets[i], nodeList);
	}	return nodeList;
}

var domFinder = {
	findNodes:function(tag, docs) {
		var res, nodes = [];
		for(var i=0; i<docs.length; i++) {
			res = docs[i].getElementsByTagName(tag);
			for(var j=0; j<res.length; j++) nodes[nodes.length] = res[j];
		}	return nodes;
	},

	filterNodes:function(select, docs) {
		var filtered = [], nodes,rule,atr,s = (/#|\./).exec(select);
		if(!s) return this.findNodes(select, docs);
		nodes = this.findNodes((rule = select.split(s))[0], docs);
		atr = (s == '#')? 'id':'className';
		for(var i=0; i<nodes.length; i++) {
			if(new RegExp('(^|\\s)' +  rule[1] + '(\\s|$)').exec(nodes[i][atr]))
				filtered[filtered.length] = nodes[i];
		}	return filtered;
	}
}
</script>

I can read from this that the script attempts to parse through the document and modify elements according to the style present.

I'm calling this within the css file with an absolute path to the file, like this body { behavior:url("http://www.ABSOLUTEPATH.com"); }but the javascript doesn't get executed.

Any idea why the javascript is not getting executed properly? Maybe I need to specify paths in the javascript file?