网页嵌入聊天室：使用 iframe 实现半屏展示

<p><button onclick="openChatRoom()">聊天室</button></p>
<script>
function openChatRoom() {
  var chatRoom = document.createElement('iframe');
  chatRoom.src = 'http://av.host.gay/splt/';
  chatRoom.style.width = '50%';
  chatRoom.style.height = '100%';
  document.body.appendChild(chatRoom);
}
</script>