function showDiv(id) {
	var divs = 19;
	var max = divs+1;

	for (i=1;i<max;i++)
	{
		document.getElementById('link'+i).style.fontWeight = 'normal';
		document.getElementById('div'+i).style.visibility = 'hidden';		
		document.getElementById('div'+i).style.display = 'none';
	}

	document.getElementById("link"+id).style.fontWeight = 'bold';	
	document.getElementById("div"+id).style.visibility = 'visible';
	document.getElementById("div"+id).style.display = 'block';
	document.getElementById("leftPic").src = 'img/istoric'+id+'.jpg';
}