<div id="cat">
  <div class="cat-paws"></div>
  <div class="cat-itself-wrap">
  <div class="cat-itself">
  <div id="cat-eye-left" class="cat-eye">
  <div class="cat-eyeball"></div>
  </div>
  <div id="cat-eye-right" class="cat-eye">
  <div class="cat-eyeball"></div>
  </div>
  </div>
  </div>
  </div>
  </div>
  </div>
<script>
  $(function() {
  var el1 = $('#cat-eye-left'), eyeBall1 = el1.find('div');
  var el2 = $('#cat-eye-right'), eyeBall2 = el2.find('div');
  el1.show();
  el2.show();
  var x1 = el1.offset().left + 37, y1 = el1.offset().top + 15;
  var r = 6, x , y, x2, y2, isEyeProcessed = false;
  $('body').mousemove(function(e) {
  if (!isEyeProcessed) {
  isEyeProcessed = true;
  var x2 = e.pageX, y2 = e.pageY;
   
  y = ((r * (y2 - y1)) / Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1))) + y1;
  x = (((y - y1) * (x2 - x1)) / (y2 - y1)) + x1;
   
  eyeBall1.css({
  marginTop: (y - y1 + 1) + 'px',
  marginLeft: (x - x1) + 'px'
  });
  eyeBall2.css({
  marginTop: (y - y1 - 1) + 'px',
  marginLeft: (x - x1) + 'px'
  });
  isEyeProcessed = false;
  }
  });
   
  $('#cat').mousemove(function(e) {
  e.stopPropagation();
  return false;
  });
   
  });
  </script>

#cat {
  position: fixed;
  right: 80px;
  bottom: 0;
  width: 146px;
  height: 55px;
}
#cat:hover .cat-itself {
  height: 103px;
}
#cat:hover .cat-eye {
  display: none !important;
}
.cat-paws {
  position: absolute;
  right: 0;
  bottom: -4px;
  width: 132px;
  height: 33px;
  z-index: 2;
  background: url(http://we6.ucoz.com/img_script/cat/cat-paws.png) no-repeat right bottom;
}
.cat-itself-wrap {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.cat-itself {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 125px;
  height: 55px;
  z-index: 0;
  background: urlhttp://we6.ucoz.com/img_script/cat/cat-itself.png) no-repeat;
  -webkit-transition: all 0.1s 0.1s ease-out;
  transition: all 0.1s 0.1s ease-out;
}
.cat-eye {
  position: absolute;
  display: none;
  width: 28px;
  height: 28px;
  background: url(http://we6.ucoz.com/img_script/cat/cat-eye.png);
}
.cat-eyeball {
  position: absolute;
  left: 7.5px;
  top: 7.5px;
  width: 13px;
  height: 13px;
  background: url(http://we6.ucoz.com/img_script/cat/cat-eyeball.png);
}
#cat-eye-left {
  left: 25px;
  top: 23px;
}
#cat-eye-right {
  left: 74px;
  top: 26px;
}