function ChangeHideDoprava(){
	if(document.getElementById('hide_dod').style.visibility=='hidden'){
		document.getElementById('hide_dod').style.visibility='';
		document.getElementById('hide_dod2').style.visibility='';
		document.getElementById('hide_dod3').style.visibility='';
	}else{
		document.getElementById('hide_dod').style.visibility='hidden';
		document.getElementById('hide_dod2').style.visibility='hidden';
		document.getElementById('hide_dod3').style.visibility='hidden';
	}
}
function ChangeHideAnketa(){
	document.getElementById('hiddenpopup').style.display='block';
}
function ChangeMenu(url){
	var i=0;
	blok = new Array("changemenu");
	url = new Array("left_menu.php?menu="+url);
	zmenObsah(blok,url,i);
	return false;
}

function zmenObsah(blok,url,i)
{
     var addr = url[i];
     if (addr != 0)
     {
        if (window.ActiveXObject)
        {
          httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else
        {
          httpRequest = new XMLHttpRequest();
        }
        httpRequest.open("GET", addr, true);
        httpRequest.onreadystatechange= function () {processRequest(blok,url,i); } ;
        httpRequest.send(null);
      }
      else
      {

        document.getElementById(blok[i]).innerHTML = "";
        
      }
		return false;
}

function processRequest(blok,url,i)
{
  if (httpRequest.readyState == 4)
  {
    if(httpRequest.status == 200)
    {
      var mistoZobrazeni = document.getElementById(blok[i]);
      mistoZobrazeni.innerHTML = httpRequest.responseText;
    	     // alert(blok+httpRequest.responseText)
	      // overit velikost pole
				i++;
			if (blok[i]){
				zmenObsah(blok,url,i);
			}
    }
    else
    {
			alert("Chyba pri nacitani stanky "+ httpRequest.status +":"+ httpRequest.statusText);
    }
  }
}
function souhlas(hlaska){
	if(confirm(hlaska)){
		return true;
	}else{
		return false;
	}
}