browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version >= 3.0) {
	roll = 'true';
	}

else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 4.0) {
	roll = 'true';
	}

function msover(img1,ref1) {
	if (roll == 'true') {
		document.images[img1].src = ref1;
		}
	}
        
function msout(img1,ref1) {
	if (roll == 'true') {
		document.images[img1].src = ref1;
		}
	}

function suckerfish(type, tag, parentId) {
	if (window.attachEvent) {
		window.attachEvent("onload", function() {
			var sfEls = (parentId==null)?document.getElementsByTagName(tag):document.getElementById(parentId).getElementsByTagName(tag);
			type(sfEls);
		});
	}
}

sfHover = function(sfEls) {
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
lnHover = function(lnEls) {
	for (var i=0; i<lnEls.length; i++) {
		lnEls[i].onmouseover=function() {
			this.className+=" lnhover";
		}
		lnEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" lnhover\\b"), "");
		}
	}
}
hdHover = function(hdEls) {
	for (var i=0; i<hdEls.length; i++) {
		hdEls[i].onmouseover=function() {
			this.className+=" hdhover";
		}
		hdEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hdhover\\b"), "");
		}
	}
}

suckerfish(sfHover, "LI", "nav");
suckerfish(lnHover, "LI", "left-nav");
suckerfish(hdHover, "LI", "hdnav");