function showAbout(){
	$('subnav_about').show();
	$('about_hover').setStyle({backgroundPosition:"0 -30px"});	
}
function showCitrus(){
	$('subnav_citrus').show();
	$('citrus_hover').setStyle({backgroundPosition:"-119px -30px"});	
}
function showMarket(){
	$('subnav_market').show();
	$('market_hover').setStyle({backgroundPosition:"-230px -30px"});	
}
function showIndustry(){
	$('subnav_industry').show();
	$('industry_hover').setStyle({backgroundPosition:"-352px -30px"});	
}
function showNews(){
	$('subnav_news').show();
	$('news_hover').setStyle({backgroundPosition:"-504px -30px"});	
}
function hideAll(){
	$('subnav_about').hide();
	$('subnav_citrus').hide();
	$('subnav_market').hide();
	$('subnav_industry').hide();
	$('subnav_news').hide();
	
	$('about_hover').setStyle({backgroundPosition:"0 0"});
	$('citrus_hover').setStyle({backgroundPosition:"-119px 0"});
	$('market_hover').setStyle({backgroundPosition:"-230px 0"});
	$('industry_hover').setStyle({backgroundPosition:"-352px 0"});
	$('news_hover').setStyle({backgroundPosition:"-504px 0"});
}