CSS按鈕點擊效果

<style type="text/css">
 .dv_bt_buttoncommit{
 margin-top: 10px;
 width: 80%;
 height: 40px;
 color: white;
 background: #1E63B0; //默認的顏色




 border-radius: 5px;
 }
 .dv_bt_buttoncommit:active{
 margin-top: 10px;
 width: 80%;
 height: 40px;
 color: white;
 border-radius: 5px;
 background: #4a9bfa; 黑色




 opacity: 0.5; //這裏重要，就是通過這個透明度來設置
 }
 </style>

 <button class="dv_bt_buttoncommit">按鈕</button>