​x
 
<!DOCTYPE html>
<html>
<body>
​
<p id="myP" style="display:none;">这是 p 元素。</p>
​
<button type="button" onclick="myFunction()">返回 p 的显示类型</button>
​
<script>
function myFunction() {
  alert(document.getElementById("myP").style.display);
}
</script>
​
</body>
</html>
​