使用JS向左向右向上移动对象

// 获取对象
var obj = document.getElementById("object");

// 向左移动
function moveLeft() {
  var currentPosition = parseInt(obj.style.left);
  obj.style.left = (currentPosition - 10) + "px";
}

// 向右移动
function moveRight() {
  var currentPosition = parseInt(obj.style.left);
  obj.style.left = (currentPosition + 10) + "px";
}

// 向上移动
function moveUp() {
  var currentPosition = parseInt(obj.style.top);
  obj.style.top = (currentPosition - 10) + "px";
}