function switchNavi(link, num){
	
	$$('a.riderLink').each(function(element){
		
		element.removeClass('active');
		
	});
	
	link.addClass('active');
	
	$$('div.naviDiv').each(function(element){
		
		element.removeClass('showDiv');
		element.addClass('hideDiv');
		
	});
	
	$('detailCol'+num).addClass('showDiv');
	
	return false;
	
}