​x
 
<!DOCTYPE html>
<html>
<body>
​
<img id="myImg" src="/i/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高度。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myImg").height;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​