browserOK = true;
pics = new Array();
var objCount = 0;

function preload(name, first, second) {
  if (browserOK) {
    pics[objCount]              = new Array(3);
    pics[objCount][0]           = new Image();
    pics[objCount][0].src       = first;
    pics[objCount][1]           = new Image();
    pics[objCount][1].src       = second;
    pics[objCount][2]           = name;
    objCount++;
  }
}

function on(name) {
  if (browserOK) {
    for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][2]] != null)
        if (name != pics[i][2]) {
          document.images[pics[i][2]].src = pics[i][0].src;
        } else {
            document.images[pics[i][2]].src = pics[i][1].src;
        }
    }
  }
}

function off(){
  if (browserOK) {
    for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][2]] != null)
        document.images[pics[i][2]].src = pics[i][0].src;
    }
  }
}

preload("kiev", "images/kiev.gif", "images/kiev-y.gif");
preload("ua", "images/ua.gif", "images/ua-y.gif");
preload("sng", "images/sng.gif", "images/sng-y.gif");
preload("free", "images/free.gif", "images/free-y.gif");
preload("back", "images/back.gif", "images/back-y.gif");