​x
 
<!DOCTYPE html>
<html>
<body>
​
<p id="demo"></p>
​
<script>
if (Math.random() < 0.5) {
  text = "<a href='https://w3school.org.cn'>访问 W3School</a>";
} else {
  text = "<a href='https://wwf.org'>访问 WWF</a>";
}
document.getElementById("demo").innerHTML = text;
</script>
​
</body>
</html>
​