(function (onLoad) {
  try {
    window.addEventListener('load', onLoad, false);
      } 
  catch (e) {
    window.attachEvent('onload', onLoad);
      }
   })
(function () {
  var tags = ["img", "input"];
  for (var i = 0, len = tags.length; i < len; i++) {
    var on = function () { this.src = this.src.replace('_off.', '_on.'); };
    var off = function () { this.src = this.src.replace('_on.', '_off.'); };
    var el = document.getElementsByTagName(tags[i]);
    for (var j = 0, len2 = el.length; j < len2; j++) {
      var attr = el[j].getAttribute('src');
      if (!el[j].src.match(/_off\./) && attr) continue;
      el[j].onmouseover = on;
      el[j].onmouseout = off;
    }
  }
});