如何让你的html button本身居中的实现

<html>
<body>
 
<center><button onClick="myClick()">hit me</button></center>
 
<script>
function myClick()
{
 alert("123");
}
</script>
</body>
</html>

<html>
<body>
 
<div align="center"><button onClick="myClick()">hit me</button></div>
 
<script>
function myClick()
{
 alert("123");
}
</script>
</body>
</html>

 <div style="text-align:center">  
 <button>按钮居中</button>                      
 </div>

<div>    
<button  style="display:block;margin:0 auto">按钮居中</button>                      
</div>