function toggle(elem) {
  if (!elem) return;
  e= document.getElementById(elem);
  e.style.display= (e.style.display=='block') ? 'none' : 'block';
}
function title(sufix) {
  document.title= document.title+ ' ~ '+ sufix;
}
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}
// blikatko :-)
function blink(state) {
  var bl= document.getElementById("blinklight");
  if (!bl) return false;
  bl.className= state ? 'on' : '';
}