function navSelect(item) {
	if ( item.className.indexOf('active') == -1 ) {
		item.className = item.className + "selected";
	}
	return false;
}

function navUnselect(item) {
	if ( item.className.indexOf('active') == -1 ) {
		var endIndex = item.className.indexOf("selected");
		if ( endIndex <= 0 )
			endIndex = item.className.length;
		item.className = item.className.substring(0, endIndex);
	}
	return false;
}

function navActive(item) {
	item.className = item.className + "active";
	return false;
}