function doBtnMouseOver(button, mouseOver, doc) {
   if (butAct != button) {
      if (browserVersion == 3 || browserVersion==4) {
         if (mouseOver) {
            doc.src = buttonImg[button].alt;
         } else {
            doc.src = buttonImg[button].src;
         }
      }
      window.status = mouseOver ? buttonImg[button].desc : "";
      return true;
   }
   return false;
}

function mouseClick(but, doc) {
   if (butAct != 99) {
      click = butAct;
      butAct = 99;
      doBtnMouseOver(click, 0, docAct);
   }
   if (but != 99) {
      doBtnMouseOver(but, 1, doc)
   }
   butAct = but;
   docAct = doc;
}

function reset() {
   if (butAct != 99) {
      click = butAct;
      butAct = 99;
      doBtnMouseOver(click, 0, docAct);
   }
}