当鼠标指针移动到图像时执行 JavaScript - 在线编辑器

          <img onmouseenter="bigImg(this)" onmouseleave="normalImg(this)" border="0" src="/examples/smiley.gif" alt="Smiley" width="32" height="32">
<p>
  bigImg() 函数在用户将鼠标指针移动到该图像时触发。</p>
<p>
  normalImg() 函数在用户将鼠标指针移出图像时触发。</p>
<script>
  function bigImg(x) {
    x.style.height = "64px";
    x.style.width = "64px";
  }

  function normalImg(x) {
    x.style.height = "32px";
    x.style.width = "32px";
  }
</script>
        