function showDiv(id) {
	document.getElementById(id).style.display='block';
}

function hideDiv(id) {
	document.getElementById(id).style.display='none';
}

function nav(id) {
	document.getElementById('home').src='templates/default/images/nav_home_off.png';
	document.getElementById('about').src='templates/default/images/nav_about_off.png';
	document.getElementById('services').src='templates/default/images/nav_services_off.png';
	document.getElementById('news').src='templates/default/images/nav_news_off.png';
	document.getElementById('article').src='templates/default/images/nav_article_off.png';
	document.getElementById('portfolio').src='templates/default/images/nav_portfolio_off.png';
	document.getElementById('contact').src='templates/default/images/nav_contact_off.png';
	
	document.getElementById(id).src='templates/default/images/nav_'+id+'_on.png';
}