<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Drag and Drop</title>
  <style>
    #dropbox {
      float: left;
      width: 500px;
      height: 300px;
      margin: 10px;
      border: 1px solid #999999;
    }
    #picturesbox {
      float: left;
      width: 320px;
      margin: 10px;
      border: 1px solid #999999;
    }
    #picturesbox > img {
      float: left;
      padding: 5px;
    }
  </style>
  <script src="dragdrop.js"></script>
</head>
<body>
  <section id="dropbox">
    <canvas id="canvas" width="500" height="300"></canvas>
  </section>
  <section id="picturesbox">
    <img id="image1" src="monster1.jpg" alt="Monster One">
    <img id="image2" src="monster2.jpg" alt="Monster Two">
    <img id="image3" src="monster3.jpg" alt="Monster Three">
    <img id="image4" src="monster4.jpg" alt="Monster Four">
  </section>
</body>
</html>