document.observe("dom:loaded", installMenu );

function installMenu() {
	var links = $$('a.main-menu');
	links.each( function( link ) {
		link.observe( 'mouseover', currentMenu );
	});
}

function currentMenu( event ) {
	var id = Event.element( event ).id + "s";
	
	$$('#menuhorizontal a').each( function( link ){
		link.removeClassName( "selected" );
	});
	
	Event.element( event ).addClassName( "selected" );
	
	$$('#menuhorizontal2 ul').each( function( ul ){
		ul.className = "";
	});
	
	var menu = null;
	if( menu = $( id ) )
		$( id ).className = "selected";
}