function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null ) node = document;
	if ( tag == null ) tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp('(^|\\s)'+searchClass+'(\\s|$)');
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}
function highlightNav() {
	var subnavs = getElementsByClass("subnav");
	var subnavheadings = getElementsByClass("subnavheading");
	for (var i=0;i<subnavs.length;i++) {
		subnavs[i].style.display="none";
	}
	
	// Check if home page
	var homepagepattern = new RegExp("http:\/\/(www2?\.)?ittc.ku.edu\/?$");
	if(location.href.search(homepagepattern)>=0) subnavheadings[0].className = "current";
	
	// Find and Highlight correct subnav
	if(undefined===window.customsubnav){
		window.customsubnav = undefined;
	}
	for (var i=1;i<subnavheadings.length;i++){ //for each subnav heading
		if ((parseUri(subnavheadings[i].href).relative == parseUri(location.href).relative) || subnavheadings[i].id==customsubnav) {
			subnavheadings[i].className = "current";
			if (subnavs[i].innerHTML.length>0) {
				subnavs[i].style.display="";
				subnavs[i].id = "cursubnav";
			}
		}
		pages = subnavs[i].getElementsByTagName("li");
		var pattern = new RegExp("http:\/\/(www2?\.)?(\w*.)?ittc.ku.edu");
		for (k=0;k<pages.length;k++) {
			a = pages[k].getElementsByTagName("a")[0];
			if ((a.href.search(pattern)>=0 && parseUri(a.href).relative == parseUri(location.href).relative) || pages[k].id==customsubnav) {
				a.className = "current";
				subnavheadings[i].className = "current";
				if (subnavs[i].innerHTML.length>0) {
					subnavs[i].style.display = "";
					subnavs[i].id = "cursubnav";
				}
			}
		}
	}
}