primaryNavHover = function() {
	var pnEls = document.getElementById("primary-nav").getElementsByTagName("LI");
	for (var i=0; i<pnEls.length; i++) {
		pnEls[i].onmouseover=function() {
			this.className+=" pnhover";
		}
		pnEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" pnhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", primaryNavHover);