​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>选中复选框时显示一些文本：</p>
​
<label for="myCheck">复选框：</label> 
<input type="checkbox" id="myCheck" onclick="myFunction()">
​
<p id="text" style="display:none">复选框已选中！</p>
​
<script>
function myFunction() {
  var checkBox = document.getElementById("myCheck");
  var text = document.getElementById("text");
  if (checkBox.checked == true){
    text.style.display = "block";
  } else {
     text.style.display = "none";
  }
}
</script>
​
</body>
</html>
​
​