​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>将 5 赋给 x，将 6 赋给 y，并显示 x + y 的结果：</p>
​
<button onclick="myFunction()">Try it</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = 5;
  var y = 6;
  document.getElementById("demo").innerHTML = x + y;
}
</script>
​
</body>
</html>
​