当我从下面的代码中删除注释部分时，它会破坏整个布局。这很奇怪，因为被注释掉的div和表不应该影响整个布局。为什么会发生这种情况？
<html>
<head>
<title> Packard Carburetors </title>
<link rel="stylesheet" type="text/css" href="css/reset.css" />
<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
<div class="wrapper">
<div id="header">
<h1 id="banner">Packard Carburetors</h1>
</div><!--Header-->
<div id="navbar" class="green">
<ul id="navigation">
<li>HOME</li>
<li>PACKARD
<ul class="sub-nav">
<li>-1930 Speedster</li>
<li>-1929-31 Super 8</li>
<li>-Late 1931-32 Super 8</li>
<li>-1929-31 Standard 8</li>
<li>-Late 1931-32 Standard 8</li>
<li>-Rare Parts</li>
<li class="last">-745 Parts</li>
</ul>
</li>
<li>CADILLAC
<ul class="sub-nav">
<li>-1932-33 V12 & V16</li>
<li class="last">-1934-1937 V12 & V16</li>
</ul>
</li>
<li>SHOPPING CART</li>
<li>CHECK OUT</li>
<li>CONTACT US</li>
</ul><!--Navigation-->
<img id="#navbar-logo" src="img/logo.png">
<p id="nav-phone" class="black center bold">775.842.4282</p>
<p class="black center nav-small bold">packardcarbs@gmail.com</p>
<p class="black center nav-small bold">Sparks, NV USA</p>
</div><!--Navbar-->
<div id="content">
<h1 class="home-banner green center bold">All Packard Carburetors 1929-'32</h1>
<h2 class="home-banner green center bold">1930 Speedster <span class="black">|</span> 1929-32 Super 8 <span class="black">|</span> 1929-32 Standard 8</h2>
<hr>
<h1 class="home-banner green center bold">Cadillac Carburetors</h1>
<h2 class="home-banner green center bold">1932 - 1937 V-12 & V-16</h2>
<img id="detroit-lubricator" src="img./detroit-lubricator.png">
<div id="middle-column">
<ul id="feature-list-home">
<li>Silicone Bronze Investment Casting</li>
<li>Precision CNC Brass Machine Parts</li>
<li>Viton-Tipped Needles</li>
<li>Current Design
<ul id="sub-feature-list-home">
<li>-Needle Seats</li>
<li>-Pressure Valves</li>
</ul>
</li>
<li>Authentic Polished Brass Components</li>
<li>Gasoline and Ethanol Proof Exterior Coating</li>
<li>Exact Size as Original</li>
</ul>
<!--<img id="middle-bar-spacer" src="img/divider-bar.png">
<div id="box-and-copy">
<img id="boxes" src="img/packard-boxes.png">
<p class="bold">All Components In-Stock!</p>
<p>Your Carburetor will be professionally assembled, engine tested and shipped quickly worldwide.</p>
</div><!-- Box and copy -->
</div><!--Middle Column -->
<div id="right-column">
<!--<table>
<tr>
<td><img src="img/carb-1.png"></td>
<td><img src="img/carb-1.png"></td>
</tr>
<tr>
<td>1930 Speedster</td>
<td>1929-1931 Super 8</td>
</tr>
<tr>
<td><img src="img/carb-3.png"></td>
<td><img src="img/carb-4.png"></td>
</tr>
<tr>
<td>1932 Super 8</td>
<td>1929-1931 Standard 8</td>
</tr>
<tr>
<td><img src="img/box.png"></td>
<td><img src="img/carb-5.png"></td>
</tr>
<tr>
<td></td>
<td>1932 Standard 8</td>
</tr>
</table>-->
</div> <!--Right Column-->
<div class="clear"></div>
<img class="bottom-spacer" src="img/spacer-bottom.png">
</div><!--Content-->
</div><!--Wrapper-->
</body>
</html>
CSS：
/*General styles*/
.wrapper {
width: 940px;
margin: 0 auto;
text-align: left;
background-image: url('../img/body-bg.png');
background-repeat: repeat-y;
overflow: auto;
}
body {
font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
font-size: 12px;
}
h1 {
font-size: 3em;
}
h2 {
font-size: 2em;
}
#content {
float: left;
width: 700px;
padding: 10px 0px 0px 20px;
}
#banner {
display: inline-block;
text-indent: -9999px;
width: 940px;
height: 201;
background-image: url('../img/banner.png');
}
.clear {
clear: both;
}
/* Nav Stuff */
#navbar {
width: 190px;
font-weight: bold;
font-size: 1.33em;
padding: 20px 20px 0px 10px;
float: left;
}
#navigation li {
padding-bottom: 20px;
}
.sub-nav{
font-size: .87em;
padding-top: 20px;
padding-left: 2.5em;
}
#navigation li ul.sub-nav li.last {
padding-bottom: 0px;
}
#nav-phone {
font-size: 1.19em;
padding-top: 15px;
}
.nav-small {
font-size: .75em;
padding-top: 5px;
}
/* Middle Column */
#middle-column{
width: 220px;
float: left;
padding-right: 20px;
margin-top: 40px;
border-right: 2px solid #000000;
}
#feature-list-home {
list-style-image: url('../img/bullet.png');
font-size: 1.17em;
padding-left: 20px;
font-weight: bold;
padding-bottom: 40px;
}
#feature-list-home li {
padding-bottom: 20px;
}
#sub-feature-list-home {
padding-left: 10px;
}
#sub-feature-list-home li {
padding-bottom: 0px;
}
#middle-bar-spacer {
padding-bottom: 20px;
}
#boxes {
padding-bottom: 10px;
}
#box-and-copy {
font-size: 1.33em;
line-height: 1.5em;
text-align: center;
}
/* Home Page Right Column */
#right-column {
float: left;
width: 420px;
padding-left: 30px;
padding-top: 20px;
overflow: hidden;
}
#right-column table {
text-align: center;
font-weight: bold;
line-height: 3em;
}
#right-column table td {
width:210px;
}
/* Home Content Banner Stuff */
.home-banner {
line-height: 1.25em;
}
#detroit-lubricator {
margin-top: 10px;
}
/* Footer */
.bottom-spacer {
padding-bottom: 50px;
}
/* OOCSS properties */
.green{
color: #117041;
}
.black{
color: #000000;
}
.center {
text-align: center;
}
.bold {
font-weight: bold;
}
这是由导航栏中的某些内容溢出并破坏布局引起的。它在导航设置为溢出时解决：隐藏。
这是由于没有关闭img 的打开注释标签
<!--<img id="middle-bar-spacer" src="img/divider-bar.png">