Html
    Css
    Js

    
                        
.box {
	border-radius:8px;
	height:100px;
	width:500px;
	background-color:#999;
	margin:0 auto;
	text-align:center;
	padding:30px;
}
#uname {
	height:100px;
	width:500px;
	background-color:#666;
	border-radius:8px;
	text-align:center;
	line-height:100px;
	color:#fff;
	font-size:30px;
}
#btn {
	border-radius:15px;
	height:60px;
	width:300px;
	background-color:#999;
	color:#fff;
	font-size:20px;
}

                        
↑上面代码改变,会自动显示代码结果 jQuery调用版本:1.11.3
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