function toggle(link){
	var node24 = document.getElementById("art24h");
	var node7 = document.getElementById("art7d");
	if (node24.className == 'visible'){
		node24.className = 'no-visible';
		node7.className = 'visible';}
	else{
		node24.className = 'visible';
		node7.className = 'no-visible';
	}
	
	if (link == 'l7d'){
		document.getElementById('l7d').className='active';
		document.getElementById('l24h').className='';
	}else{
		document.getElementById('l7d').className='';
		document.getElementById('l24h').className='active';
	}
}