.signupH {
background-color:#9FADBC;
color:white;
border-top-left-radius:10px;
border-top-right-radius:10px;
width:300px;
height:18px;
font-family:Tahoma, Geneva, sans-serif;
font-weight:3px;
text-align:center;
margin-top:-10px;
margin:auto;
position:absolute;
top:0;
left:0;
bottom:20;
right:0;
padding:10px;
}
.signupback {
background-color:#55789e;
width:300px;
height:210px;
margin:auto;
position:absolute;
top:0;
left:0;
bottom:0;
right:0;
padding:10px;
webkit-border-radius: 10px;
khtml-border-radius: 10px;
moz-border-radius: 10px;
border-radius: 10px;
}<body bgcolor="#215698">
<div class="signupback">
<table>
<center><div class="signupH">
Graphicx | Sign up
</div></center>
<br>
<form role="form" action="login-post.php" method="POST">
<table align="middle">
<tr>
<td>
Username:
</td>
<td>
<input id="username" type="text" value="username"
onfocus="this.value = this.value=='username'?'':this.value;"
onblur="this.value = this.value==''?'username':this.value;", >
</td>
</tr>
<tr>
<td>
Email:
</td>
<td>
<input id="email" type="text" value="email"
onfocus="this.value = this.value=='email'?'':this.value;"
onblur="this.value = this.value==''?'email':this.value;", >
</td>
</tr>
<tr>
<td>
Password:
</td>
<td>
<input id="password" type="password" value="password"
onfocus="this.value = this.value=='password'?'':this.value;"
onblur="this.value = this.value==''?'password':this.value;", >
</td>
</tr>
<center><button type="submit" class="button">Sign up</button></center>
</form>
</div>
</table>
<br>
</body>该按钮位于表单顶部，我需要它位于用户名、电子邮件和密码文本字段下方。有人可以帮我解决这个错误吗？
我需要将按钮移到文本字段下方，但仍必须位于表单属性内才能将其与我的 SQL 数据库连接。
求助!!!
最佳答案
尝试将其放入另一组表格行标签中:
</td>
</tr>
<tr>
<td>
<center><button type="submit" class="button">Sign up</button></center>
</td>
</tr>
</form>
...或者通过给它以下属性使其成为 CSS 中的 block 元素:
style="display:block"
关于html - 将 <button=type> 与 .CSS 居中对齐，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30276829/