我已经尝试使用 display"table; 和 display: table-cell; 使 div 像表格一样工作的方法，但现在由于某种原因我的表格不是变得相同的高度，我不确定为什么会这样，这是我添加 css 时的样子:
这是我不这样做的时候:
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title></title>
<link rel="stylesheet" href="css/normalize.css" type="text/css" media="screen" />
<link rel="stylesheet" href="css/sitecss.css" type="text/css" media="screen" />
</head>
<body>
<form action="https://zenit.senecac.on.ca/~emile.ohan/cgi-bin/cardApplication.cgi" method="post" id="application" name="application">
<fieldset>
<legend class="t"><img src="https://zenit.senecac.on.ca/~emile.ohan/int222/bank-logo.png"alt="Assignment #3" />Seneca Bank - Credit Card Application</legend>
<div class="clearfix parent">
<aside class="l child">
<fieldset>
<legend>Primary Applicant's Information</legend>
<table>
<tr>
<td>First Name*</td>
<td><input type="text" name="fName" id="fName" size="20" maxlength="20" autofocus="autofocus"></td>
</tr>
<tr>
<td>Surname*</td>
<td><input type="text" name="sName" id="sName" size="20" maxlength="30"></td>
</tr>
<tr>
<td>Date of Birth*</td>
<td><input type="text" name="dob" id="dob" size="10" maxlength="9" placeholder="MMMDDYYYY"></td>
</tr>
<tr>
<td>Email Address*</td>
<td><input type="text" name="email" id="email" size="20" maxlength="60"></td>
</tr>
<tr>
<td>Phone No.*</td>
<td><input type="text" name="phone" id="phone" size="20" maxlength="12"></td>
</tr>
</table>
</fieldset>
</aside>
<section class="s child">
<fieldset>
<legend>Primary Applicant's Address</legend>
<table>
<tr>
<td>Home Address*</td>
<td>Apt.</td>
</tr>
<tr>
<td><input type="text" name="address" id="address" size="30" maxlength="60"></td>
<td><input type="text" name="apt" id="apt" size="5" maxlength="4"></td>
</tr>
<tr>
<td><br />City* </td>
</tr>
<tr>
<td><input type="text" name="city" id="city" size="20" maxlength="40">
</tr>
<tr>
<td><br />Province*</td>
<td><br />Postal Code</td>
</tr>
<tr>
<td>
<select id="province" name="province" size="2">
<optgroup label="Province">
<option value="">(Select a Province)</option>
<option value="Alberta">Alberta</option>
<option value="British Columbia">British Columbia</option>
<option value="Manitoba">Manitoba</option>
<option value="New Brunswick">New Brunswick</option>
<option value="Newfoundland & Labrador">Newfoundland & Labrador</option>
<option value="Nova Scotia">Nova Scotia</option>
<option value="Ontario">Ontario</option>
<option value="Prince Edward Island">PE</option>
<option value="Quebec">Quebec</option>
<option value="Saskatchewan">Saskatchewan</option>
</optgroup>
<optgroup label="Territory">
<option value="Northwest Territories">Northwest Territories</option>
<option value="Nunavut">Nunavut</option>
<option value="Yukon">Yukon</option>
</optgroup>
</select>
</td>
<td>
<input type="text" name="postal" id="postal" size="8" maxlength="7" placeholder="ANA NAN">
</td>
</tr>
</table>
</fieldset>
</section>
<aside class="r child">
<fieldset>
<legend>Housing Status</legend>
<table>
<tr>
<td>Do you:</td>
<td>$Monthly Payment* </td>
</tr>
<tr>
<td><input type="checkbox" name="hStatus" id="s01" value="Own" />Own the property</td>
<td><input type="text" name="payment" id="payment" size="8" maxlength="6"></td>
</tr>
<tr>
<td><input type="checkbox" name="hStatus" id="s02" value="Rent" />Rent the property</td>
</tr>
<tr>
<td>Monthly Income*</td>
<td><input type="text" name="income" id="income" size="8" maxlength="6"></td>
</tr>
<tr>
<td>Years at current location*</td>
<td><input type="text" name="currYears" id="currYears" size="3" maxlength="2"></td>
</tr>
<tr>
<td>Pre-authorized Code*</td>
<td><input type="text" name="preCode" id="preCode" size="8"></td>
</tr>
</table>
</fieldset>
</aside>
</div>
<div class="clearfix parent">
<section class="s child">
<fieldset>
<legend>Reserved - See below</legend>
<p><b>If you submit your application with errors and/or omissions, a list of errors and/or omissions will show here. Make the corrections and re-submit.</b></p>
<p><b>If you continue to have a problem submitting your application, make a note of the Reference No. and call us at 1-800-010-2000.</b></p>
</fieldset>
</section>
<aside class="l child">
<fieldset>
<legend>Credit Check / Email Consent</legend>
<p><b>I consent to have a credit check performed</b></p>
<input type="checkbox" name="creditCheck" id="c01" value="Yes" />Yes
<input type="checkbox" name="creditCheck" id="c02" value="No" />No
<br />
<p><b>I consent to have email messages sent to me</b></p>
<input type="radio" name="emailConsent" id="m01" value="Yes" />Yes
<input type="radio" name="emailConsent" id="m02" value="No" />No
<br />
Submitted on:
<script>
var d = new Date();
document.write(d.toDateString());
</script>
    Ref. # <input type="text" name="refNo" id="refNo" size="8" readonly="readonly"> <br />
<!--Submit Application--> <input type="submit" value="Submit Application">
<!--Start Over--> <input type="reset" value="Start Over">
<input type="hidden" name="hName" id="hName" value="Mahmood"> <br />
<input type="hidden" name="hId" id="hId" value="int222_162d16"> <br />
</fieldset>
</aside>
</div>
</fieldset>
</form>
<footer class=f>
<a href="../">My zenit Account</a> <a href="javascript/">My JavaScript</a> <a href="css/">My CSS</a> <a href="honesty.html">My Honesty</a>
<script>
var dt=new Date(document.lastModified); // Get document last modified date
document.write('<p>This page was last updated on '+dt.toLocaleString()) + '</p>';
</script>
</footer>
</body>
</html>
CSS:
footer.f
{
text-align: center;
}
legend
{
border: 4px groove #ff0000;
background-color: #9999ff;
color: #FFFFFF;
font-size: 16px;
font-weight: bold;
padding: 15px;
text-shadow:0.1em 0.1em 0.01em #333;
}
legend.t
{
vertical-align: top;
}
fieldset
{
border-color:#F00;
border-style: solid;
}
html, body
{
max-width: 100%;
/*overflow-x: hidden;*/
margin:0;
}
aside.r
{
float: right;
width: 31%;
margin: 1%;
}
aside.l
{
float: left;
width: 31%;
margin: 1%;
}
section.s /*shadow on sections*/
{
width: 31%;
margin: 1%;
display: inline-block;
}
.clearfix:before,
.clearfix:after
{
content: " ";
display: table;
}
.clearfix:after
{
clear: both;
}
/**
* For IE 6/7 only
*/
.clearfix
{
*zoom: 1;
}
table
{
border-spacing: 5px;
border-collapse:separate;
}
.parent
{
display: table;
}
.child
{
display: table-cell;
}
最佳答案
在您提供的代码中，一些标签没有关闭
<tr>
<td><input type="text" name="city" id="city" size="20" maxlength="40"> <!-- Missing </td> -->
</tr>
这里在类上添加双引号
<footer class=f> <!-- <footer class="f"> -->
关于html - 制作等高的列效果不佳？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38492111/