<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://webmaster-ucoz.ru/ucoz/1/img/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: url(http://webmaster-ucoz.ru/ucoz/1/img/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://webmaster-ucoz.ru/ucoz/1/img/cat/cat-eye.png);  
}  
.cat-eyeball {  
  position: absolute;  
  left: 7.5px;  
  top: 7.5px;  
  width: 13px;  
  height: 13px;  
  background: url(http://webmaster-ucoz.ru/ucoz/1/img/cat/cat-eyeball.png);  
}  
#cat-eye-left {  
  left: 25px;  
  top: 23px;  
}  
#cat-eye-right {  
  left: 74px;  
  top: 26px;  
}