​x
 
<!DOCTYPE html>
<html>
<body>
​
<object id="myObject" width="300" height="300" data="/i/photo/tulip.jpg" type="image/jpeg"></object>
​
<p>单击该按钮可显示对象的媒体类型。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myObject").type;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​