print out effect jquery

jsdoit.css

* {
  margin: 0;
  padding: 0;
  border: 0;
}

body {
  background: #fdf;
  font: 30px sans-serif;
}

#top{
    position:absolute;
    top:0;
    left:0;
    z-index:9999;
}
#bottom{
    position:absolute;
    top:284px;
    left:0;
    z-index:9995;
}
#paper{
    position:absolute;
    top:204px;
    left:250px;
    z-index:9997;
    width:300px;
    height:50px;
    line-height:50px;
    padding:15px 0;
    background:#fff;
    border:1px solid #999;
    text-align:center;
    font-weight:bold;
    font-size:22pt;
    -webkit-box-shadow: 0 8px 6px -6px black;
       -moz-box-shadow: 0 8px 6px -6px black;
            box-shadow: 0 8px 6px -6px black; 
}

jsdoit.html

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"> </script>
<img id="top" src="http://s1.postimage.org/txsnx2v9r/imgtop.png" />
<div id="paper">Receipt</div>
<img id="bottom" src="http://s1.postimage.org/3o7lea9cf/imgbot.png" />

jsdoit.js

$('#paper').animate({'top':'284px'}, 3000);