// JavaScript Document 

function nazev_on(){
  document.getElementById("nazev1").className ="off"; 
  document.getElementById("nazev2").className="disabled";
  document.getElementById("nazev2").disabled=true;
  if (document.getElementById("p11").checked) {
    document.getElementById("nazev1").className ="on"; 
    document.getElementById("nazev2").className="text";
    document.getElementById("nazev2").disabled=false;
  }
  else {
    document.getElementById("nazev1").className ="off"; 
    document.getElementById("nazev2").className="disabled"; 
    document.getElementById("nazev2").disabled=true;
  }
}
window.onload = nazev_on;