function changeClass(obj) {
	//var lnks = document.getElementsByTagName('a');
	var lnks = document.getElementsByTagName('li');
	for (var i = 0; i < lnks.length; i++) {
		// getAttribute('className') is for IE browsers since it does not recognize "class"
		if (lnks[i].getAttribute('class') == "active" || lnks[i].getAttribute('className') == "active") {
			lnks[i].className = "inactive";
		}
	}
	obj.className = "active";
}