// JavaScript Document - změna loga na strance
  document.write("<style type=\"text/css\">");
  var cookienazev="cookielogo"; // nazev ulozene cookies
  var cookies = document.cookie; // nacteni cookies
  var logo="darek3.png"; // implicitni hodnota
  var umisteni = cookies.indexOf(escape(cookienazev) + '='); // vyhledani cookie v cookies
  if (umisteni != -1) { // podarilo se najit nazev cookie
    umisteni = umisteni + (escape(cookienazev) + '=').length; // konec cookie
    hodnota = cookies.indexOf(';', umisteni);
	  if (hodnota == -1){ // nenasel jsem hodnotu
        hodnota = cookies.length;
    }
    logo = cookies.substring(umisteni, hodnota); // nacteni barvy
  }
  switch(logo){
    case "darek.png":
      logo = "darek1.png";
      document.cookie = "cookielogo="+escape("darek1.png");
      break;
    case "darek1.png":
      logo = "darek2.png";
      document.cookie = "cookielogo="+escape("darek2.png");
      break;
    case "darek2.png":
      logo = "darek3.png";
      document.cookie = "cookielogo="+escape("darek3.png");
      break;
    case "darek3.png":
      logo = "darek.png";
      document.cookie = "cookielogo="+escape("darek.png");
      break;
    default:
      logo = "darek.png";
      document.cookie = "cookielogo="+escape("darek.png");
  }
  document.write('#hlavicka { background: url(picture/'+logo+") no-repeat right; }"); // vytvoreni css
  document.write("</style>");