function highlight(navid) {
	// Highlight the nav item for this page
	document.getElementById( 'nav_' + navid ).className = 'current';

	// Check that nav item exists
//	if (nav!=null) {
//		nav.className = 'current';
//	}
	return
}


function highlight2(navid, subnavid) {
	document.getElementById( 'nav_' + navid ).className = 'current';
	document.getElementById( 'subnav_' + subnavid ).className = 'arrow current';
	return
}