我有一个 div 类，包含按钮、选择框和输入文本（在我的所有 jsp 文件中作为 div 共享），我在其中设置了 css 样式（文本对齐：居中）；
当这个 div 向左对齐时，我可以按下并输入所有这些。
这是我包含的jsp文件http://scratchpad.io/first-protest-1771
如果我不包含整个代码，无论我如何对它们进行文本对齐，我的 div 都能正常工作。
谁能告诉我，怎么了？
【问题讨论】：
您可以使用此代码
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="javascript/lib/jquery-1.11.0.js"></script>
<title>eBanking</title>
<link rel="stylesheet" href="style.css">
<style type="text/css">
@media print {
.example-screen {
display: none;
}
.example-print {
display: block;
}
}
.extraCont {
color: white;
}
td {
/* text-align: center; */
}
footer {
position: fixed;
left: 0;
bottom: 0;
width: 100%;
background-color: red;
color: white;
text-align: center;
}
body {
margin: 0;
padding: 0;
background: url(bg.jpg) no-repeat;
background-size: cover;
font-family: Arial;
}
.loginBox {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 350px;
height: 420px;
padding: 80px 40px;
box-sizing: border-box;
background: rgba(0, 0, 0, .5);
}
h2 {
margin: 0;
padding: 0 0 20px;
color: #efed40;
text-align: center;
}
h3 {
color: #efed40;
}
h1 {
color: #efed40;
text-align: center;
}
.loginBox p {
margin: 0;
padding: 0;
font-weight: bold;
color: #fff;
}
.loginBox input {
width: 100%;
margin-bottom: 20px;
}
.loginBox input[type="text"],
.loginBox input[type="password"] {
border: none;
border-bottom: 1px solid #fff;
background: transparent;
outline: none;
height: 40px;
color: #fff;
font-size: 16px;
}
::placeholder {
color: rgba(255, 255, 255, .5);
}
.loginBox input[type="submit"] {
border: none;
outline: none;
height: 40px;
color: #fff;
font-size: 16px;
background: #ff267e;
cursor: pointer;
border-radius: 20px;
}
.loginBox input[type="submit"]:hover {
background: #efed40;
color: #262626;
}
.loginBox a {
color: #fff;
font-size: 14px;
font-weight: bold;
text-decoration: none;
}
.menuBox ul {
margin: 0 auto;
padding: 0px;
list-style: none;
text-align: center;
}
.menuBox ul li {
float: left;
width: 210px;
height: 40px;
background-color: black;
color: white;
opacity: .8;
line-height: 40px;
text-align: center;
font-size: 20px;
margin-right: 25px;
}
.menuBox ul li a {
text-decoration: none;
color: white;
display: block;
padding: 0px 15px;
}
.menuBox ul li a:hover {
background-color: green;
}
.menuBox .menuboxli {
text-align: center;
margin: 0 auto;
display: inline-block;
vertical-align: middle;
float: none;
}
ul li ul li {
display: none;
}
ul li:hover ul li {
display: block;
}
.sanBox {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 600px;
height: 500px;
padding: 80px 40px;
box-sizing: border-box;
background: rgba(0, 0, 0, .5);
}
.menuBox {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 870px;
height: 500px;
padding: 80px 40px;
/* box-sizing: border-box; */
/* background: rgba(0,0,0,.5) ; */
}
.mapBox {
position: absolute;
top: 60%;
left: 50%;
transform: translate(-50%, -50%);
width: 1280px;
height: 600px;
padding: 80px 40px;
box-sizing: border-box;
background: rgba(0, 0, 0, .5);
}
.user {
width: 100px;
height: 100px;
border-radius: 50%;
overflow: hidden;
position: absolute;
top: calc(-100px/2);
left: calc(50% - 50px);
}
.menuRight ul {
list-style-type: none;
margin: 0;
padding: 10px;
overflow: hidden;
}
.menuRight li {
float: right;
}
.menuRight li a {
display: inline-block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
.vizCont {
margin-top: 120px;
text-align: center;
}
.white {
color: white;
}
#renunta {}
#renunta a {
color: #fff;
font-size: 14px;
font-weight: bold;
text-decoration: none;
}
</style>
</head>
<body>
<div class="menuRight">
<ul>
<li><a href="logout.jsp">Logout</a></li>
</ul>
</div>
<div class="menuBox">
<h1>eBanking</h1>
<ul>
<li class="menuboxli"><a>CONTURIffgfdfg</a>
<ul>
<li><a href="administrareCont.jsp">AdministrareCont</a></li>
<li><a href="vizualizareCont.jsp">VizualizareCont</a></li>
</ul>
</li>
<li class="menuboxli"><a>OPERATII</a>
<ul>
<li><a href="transfer.jsp">Transfer</a></li>
<li><a href="alimentareCont.jsp">OperatiiInCurs</a></li>
</ul>
</li>
<li class="menuboxli"><a>RAPOARTE</a>
<ul>
<li><a href="extraCont.jsp">ExtraCONT</a></li>
</ul>
</li>
<li class="menuboxli"><a href="aprobare.jsp">APROBARE</a></li>
</ul>
</div>
<footer> Tomuta Dan Claudiu dannyetlv @2019 </footer>
</body>
</html>【讨论】：