function skryt(){
 document.getElementById('hide').style.display = 'none';
 document.getElementById('paticka').style.display = 'none';
 document.getElementById('show').style.display = 'block';
}
function obsah(){
 document.getElementById('hide').style.display = 'block';
 document.getElementById('paticka').style.display = 'block';
 document.getElementById('show').style.display = 'none';
}