Simple slide panel with jquery

Hello friends. Here is the code for a simple slide panel

Html and Css

  <style type="text/css">
  .box {
      width: 320px;
      text-align: justify;
      background-color: #eeeeee;
      overflow: hidden;
      font-size: 12px;
      color: #333333;
      line-height: 18px;
      padding: 0px 10px 4px;
      font-family: Arial, Helvetica, sans-serif;
  }
  .clik {
      font-size: 12px;
      text-decoration: none;
      font-weight: bold;
      color: #ffffff;
      font-family: Arial, Helvetica, sans-serif;
      width: 340px;
      background-color: #4D90FE;
      text-align: center;
      display: block;
      line-height: 33px;
  }
  </style>
  
  <a class="clik" href="javascript:;" >Click Here</a>
  
  <div class="box" id="addthis" style="display: none;"> 
    Lorem Ipsum is simply dummy text of the printing and
    typesetting industry. Lorem Ipsum has been the 
    industry's standard dummy text ever since the 1500s,
    when an unknown printer took a galley of type and 
    scrambled it to make a type specimen book. It has 
    survived not only five centuries, but also the leap
    into typesetting, remaining essentially unchanged. 
  </div>

The javascript

 <script src="https://ajax.googleapis.com/ajax/libs/
jquery/1.4.2/jquery.min.js"></script>

  <script>
      $(".clik").click(function(){
      $('#addthis').slideToggle(500);
  });
  </script>

The example
 

Click Here

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.