function show_hide_fak(divName, show_or_hide) {
	if (divName && document.getElementById(divName)) {
	 if (show_or_hide == 0) { 
    document.getElementById(divName).className = "hidden_div"; 
    document.getElementById('fak_ulica').className = "";
    document.getElementById('fak_psc').className = "";
    document.getElementById('fak_mesto').className = ""; 
    
  }
	 if (show_or_hide == 1) { 
   document.getElementById(divName).className = "visible_div"; 
    document.getElementById('fak_ulica').className = "A_required";
    document.getElementById('fak_psc').className = "A_required";
    document.getElementById('fak_mesto').className = "A_required";    
   }	
	}
}