// zjisti nabidku vice kategorii
  function getMore() {
    var more = document.getElementById('zalozky_more');
    var items = more.getElementsByTagName('ul');
    var div = document.getElementById('more_menu');
    if(items.length == 0) {
      div.setAttribute('onmouseover', null);
    }
    
    var more = document.getElementById('zalozky_mores');
    var items = more.getElementsByTagName('ul');
    var div = document.getElementById('more_submenu');
    if(items.length > 0) {
      div.style.visibility = "visible";
    }
  }

  function ukazPodmenu(id){
	  document.getElementById(id).style.visibility = "visible";
  }

  function skryjPodmenu(id) {
    document.getElementById(id).style.visibility = 'hidden';
  }


/* nastav vysku */

function nastavVysku(){
	var vyska = document.documentElement.clientHeight;
	var novaVyska = vyska - 32 - 52;
	var vyskaScroll = document.getElementById('vyska').offsetHeight;
	if (vyskaScroll < novaVyska){
		document.getElementById('vyska').style.height = novaVyska + 'px';
	}
}

/* upravit menu 
function menu() {
  var menu = document.getElementById('menu_ul');
  var widthElm = menu.offsetWidth;
  var anchors = menu.getElementsByTagName('a');
  
  if(widthElm > 600) {
    for(i=0;i<anchors.length;i++) {
      if(menu.childNodes[i].className=="menu")
        menu.childNodes[i].setAttribute("style", "padding: 0");
      anchors[i].setAttribute("style", "font-size: 0.8em; letter-spacing: -0.02em;");
    }
  }
    
}*/