html运行实例（hdom_image_alt）-搜寻教程库

代码示例：（标识：hdom_image_alt）

<!DOCTYPE html>
<html>
<body>

<img id="myImg" src="/static/demo/images/shanghai_lupu_bridge.jpg" alt="上海卢浦大桥" width="350" height="234">

<p>单击按钮以显示图像的替代文本。</p>

<button onclick="myFunction()">试一试</button>

<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myImg").alt;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>