//var HOME = 'http://2011.ceskestavebnictvi.cz'
var HOME=''
function menub(id){
var img=document.getElementById('img_'+id)
menu(img,id);
}
function menu(img,id) {

	var ul = document.getElementById('menu' + id);
	if (!ul) return true;

	var m = getCookie();
	
	if (ul.style.display=='block') {
		img.src = HOME + '/images/bila_dolu.png';
    img.parentNode.style.color="#fff";
		ul.style.display='none';
    img.parentNode.className="" ;
		val = '0';		
	} else {
		img.src = HOME + '/images/modra_nahoru.png';
    img.parentNode.className="vybrano" ;
		ul.style.display='block';
		val = '1';
	}
  //   alert(img.parent);
	m = m.substring(0,id-1) + val + m.substring(id,m.length)
	setCookie(m,'ceskestavebnictvi.cz');
	return false;
}

function menuinit() {
	
	var m = getCookie();
	for (var id=1; id<20; id++) {
		if (m.charAt(id-1) == '1') {
			var ul = document.getElementById('menu' + id);
			if (ul) ul.style.display='block';
		}
	}
	
}

function setCookie(value, domain, expires, path, secure) {
  var curCookie = "menu=" + value +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}


function getCookie() {
	var defaultCookie = '00000000000000000000';
	var dc = document.cookie;
  	var prefix = "menu=";
  	var begin = dc.indexOf("; " + prefix);
  	if (begin == -1) {
    	begin = dc.indexOf(prefix);
    	if (begin != 0) return defaultCookie;
  	} else {
    	begin += 2;
    }
  	
	var end = document.cookie.indexOf(";", begin);
  	if (end == -1) end = dc.length;
  	
	dc = dc.substring(begin + prefix.length, end);
	if (dc.length != defaultCookie.length)
		dc = defaultCookie;
	
	return dc;
}

function Ukaz(){
var s=document.getElementById("skryj")
s.style.display="inline"
var d=document.getElementById("dalsi")
	d.style.display="none"
}