<button>點擊我</button>

<style>
button {
background-color: #4CAF50;
border: none;
color: white;
padding: 15px 32px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
cursor: pointer;
}
button:hover {
background-color: #3e8e41;
}
</style>

<div>
<button>按鈕1</button>
<button>按鈕2</button>
<button>按鈕3</button>
</div>

<button onclick="alert('按鈕被單擊了')">點擊我</button>