html：<button id="戰斗按鈕" onclick="戰斗()">戰斗</button><br /> ?? ??? ?<div id="戰斗">?? ??? ??? ?<span id="戰斗消息"></span>?? ??? ?</div>script：?function 戰斗(){??? ?var 戰斗消息="";?? ?var obj=document.getElementById('戰斗');?? ?if(obj.style.display=='none'){?? ??? ?obj.style.display='block';?? ??? ?document.getElementById("戰斗按鈕").innerHTML='離開戰斗';?? ??? ?戰斗消息+="在這個世界，你已經無敵了"+"<br/>";??? document.getElementById("戰斗消息").innerHTML=戰斗消息;?? ?}else{?? ??? ?obj.style.display='none';?? ??? ?document.getElementById("戰斗按鈕").innerHTML='戰斗';?? ?}}style：?? ???? <style>?? ??? ???? *{?? ??? ??? ??? ?position: relative;?? ??? ???? }?? ??? ???? #戰斗{?? ??? ??? ??? ?position: absolute;?? ??? ??? ??? ?width: 100%;?? ??? ??? ??? ?height: 100%;?? ??? ??? ??? ?display: none;?? ??? ???? }?? ??? ?</style>