function addClass( element, value ) {
	if ( !element.className ) {
		element.className = value;
	} else {
		newClassName = element.className;
		newClassName+= " ";
		newClassName+= value;
		element.className = newClassName;
	}
}

function LinkRollover() {
	if ( !document.getElementsByTagName ) return false;
	if ( !document.getElementById ) return false;
	if ( !document.getElementById("headerLinks") ) return false;

	var nav = document.getElementById("headerLinks");
	var navlinks = nav.getElementsByTagName("a");
	highlightSelected(navlinks);
	return true;
}

function highlightSelected(links) {
	var current_url = window.location.href;
	for(var i=0; i<links.length; i++) {
		var current_link = links[i].getAttribute("href");
		
		if ( current_url.indexOf(current_link) != -1 ) {
			addClass(links[i], "selected");
		}
	}
	return true;
}

window.onload = function() {
	LinkRollover();
}