function ZmenaClassText(TextID,styl)
 {
    obj = document.getElementById(TextID);
    obj.className=styl;
 }
function zmenaobr(jmeno_obr,novy_obr,stav)
 {
  document.images[jmeno_obr].src=novy_obr;
 }
function ZmenaClassTD(TDID, styl)
 {
  obj = document.getElementById(TDID);
  obj.className = styl;
 }
function NewWindow(mypage, myname, w, h, scroll)
 {
  var winl = (screen.width - w) / 2;
  var wint = (screen.height - h) / 2;
  winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
  win = window.open(mypage, myname, winprops);
  if (parseInt(navigator.appVersion) >= 4)
   {
    win.window.focus();
   }
  return win;
 }