根据按下的键改变图像的位置？

<img id="myImage" src="image.jpg" style="position: absolute; top: 0; left: 0;">

document.addEventListener('keydown', function(event) {
  var image = document.getElementById('myImage');
  var currentPosition = image.style.position;
  var currentTop = parseInt(image.style.top);
  var currentLeft = parseInt(image.style.left);
  
  // 根据按下的键来改变图像的位置
  switch(event.keyCode) {
    case 37: // 左箭头键
      image.style.left = (currentLeft - 10) + 'px';
      break;
    case 38: // 上箭头键
      image.style.top = (currentTop - 10) + 'px';
      break;
    case 39: // 右箭头键
      image.style.left = (currentLeft + 10) + 'px';
      break;
    case 40: // 下箭头键
      image.style.top = (currentTop + 10) + 'px';
      break;
  }
});