<!--

  cze_off = new Image(46, 157); cze_off.src = "st-img/umenu-cs_off.jpg";
  cze_on = new Image(46, 157);   cze_on.src = "st-img/umenu-cs_on.jpg";
  sk_off = new Image(47, 157);   sk_off.src = "st-img/umenu-sk_off.jpg";
  sk_on = new Image(47, 157);     sk_on.src = "st-img/umenu-sk_on.jpg";


 function img_off(imgName)
 {
   imgOff = eval(imgName + "_off.src");
   document[imgName].src = imgOff;
 }
function img_on(imgName)
 {
   imgOn = eval(imgName + "_on.src");
   document[imgName].src = imgOn;
 }
// -->