JQuery div.pan animation

http://stackoverflow.com/questions/14038155/how-to-implement-carousel-effect-using-jquery-javascript/14038382#comment19408145_14038382

HTML

<div class="slider">
  <div class="pan">
      <div>lorem</div>
      <div>ipsum</div>
  </div>
</div>
<div class="slider unoverflow">
  <div class="pan">
      <div>lorem</div>
      <div>ipsum</div>
  </div>
</div>

CSS

body {
    background: #888;
}

.slider {
  border: 2px dotted #000;
  width: 30%;
  height: 100px;
  z-index: 2;
  margin: 3% auto;
}

.pan {
  width: 200%;
  height: 90px;
  background: #FFF;
  z-index: 1;
  margin: 5px;
}

.pan div {
    float: left;
    width: 40%;
    margin: 5%;
}

.unoverflow {
  overflow: hidden;
}

JavaScript

// .pan role in slider

function animation(){
    var target = 0 - parseInt($('.pan').width()) / 2;
    $('.pan').stop().animate({"margin-left": target}, 2000, function(){
        
    });
}
animation();