function show(id) {
  var names = document.getElementById('kurz').getElementsByTagName('div');
  for (i = 0; i < names.length; i++) names[i].style.display = 'none';
  document.getElementById(id).style.display = 'block';
}

function hide(id) {
  var names = document.getElementById('jazyk').getElementsByTagName('img');
  for (i = 0; i < names.length; i++) {
		names[i].style.filter = 'alpha(opacity=20)';
		names[i].style.mozOpacity = '0.2';
		names[i].style.opacity = '0.2';
		names[i].style.cursor = 'pointer';
		names[i].style.borderBottom = 'none';
		names[i].style.margin = '0px 8px';				
	}	
  document.getElementById(id).style.filter = 'alpha(opacity=100)';
	document.getElementById(id).style.mozOpacity = '1';
	document.getElementById(id).style.opacity = '1';
	document.getElementById(id).style.cursor = 'default';
	document.getElementById(id).style.borderBottom = '10px solid #b0de8c';
}

function note(rok, mesic) {
  var names = document.getElementById('poznamky').getElementsByTagName('div');
  for (i = rok - 1; i < rok + 2; i++)
	for (j = 1; j < 13; j++) {
		if (document.getElementById('m-' + i + '-' + j)) document.getElementById('m-' + i + '-' + j).style.color = 'black';		
		for (k = 0; k < names.length; k++) if (document.getElementById('p-' + i + '-' + j + '-' + k)) document.getElementById('p-' + i + '-' + j + '-' + k).style.display = 'none';
	}
  for (i = 0; i < names.length; i++) if (document.getElementById('p-' + rok + '-' + mesic + '-' + i)) document.getElementById('p-' + rok + '-' + mesic + '-' + i).style.display = 'block';
	document.getElementById('m-' + rok + '-' + mesic).style.color = '#ea4e35';
}