jQuery: Fading an image out

The jQuery Code START
    
    <script type="text/javascript" src="./jquery-1.5.1.js"></script>
    <script type="text/javascript">
      function fadeout() {
        $('#target').fadeOut(2000);
      }
      
      function fadein() {
        $('#target').fadeIn(2000);
      }

    </script>
    
    <style type="text/CSS">
        <!--
        .code { color: red; }
        .back { background-color: yellow; }
        
        .div1 { height:324px;
                width:243px;
                background-image: url(s.gif);
                background-repeat: repeat; }
        -->
   </style>
  </head>

  <body>
    <h1>jQuery: Fading an image out</h1>
    <div class="div1">
        <img id="target" src="Image1.jpg" width="324" height="243" />
    </div>
    <br />
    <form action="">
        <input type="button" value="Fade Out" onclick="fadeout()"></input>
        <input type="button" value="Fade In" onclick="fadein()"></input>
    </form>