​x
 
<!DOCTYPE html>
<html>
<body>
​
<embed id="myEmbed" src="/i/photo/tulip.jpg" width="300" height="300">
​
<p>点击按钮可返回图像的宽度。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myEmbed").width;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​