function init() {
  // Books //
  lib = document.getElementById("lib");
  res = document.getElementById("res");
  funds = document.getElementById("funds");
  serv = document.getElementById("serv");
  cat = document.getElementById("cat");
  
  // Lampotschka...
  bulb = document.getElementById("bulb");
  if(bulb) {
	ID = setInterval("showBulb()", 1000);
  }
}

function roll(which, over) {
  if(over) {
    lib.style.backgroundImage = "url(/source/lib_over.gif)";
    res.style.backgroundImage = "url(/source/res_over.gif)";
    funds.style.backgroundImage = "url(/source/funds_over.gif)";
    serv.style.backgroundImage = "url(/source/serv_over.gif)";
    cat.style.backgroundImage = "url(/source/cat_over.gif)";
    which.style.backgroundImage = which.style.backgroundImage.split("_over.gif)")[0] + ".gif)";
  } else {
    lib.style.backgroundImage = "url(/source/lib.gif)";
    res.style.backgroundImage = "url(/source/res.gif)";
    funds.style.backgroundImage = "url(/source/funds.gif)";
    serv.style.backgroundImage = "url(/source/serv.gif)";
    cat.style.backgroundImage = "url(/source/cat.gif)";
  }
}

function showBulb() {
  if(document.body.clientHeight >= 666) {
	bulb.style.display = "block";
  } else {
    bulb.style.display = "none";
  }
}