Высота блока как у родителя - Вопросы по CSS

<body>
  <div id="container">
     <div id="header"></div>
     <div id="navbar">
      <jdoc:include type="modules" name="top" />
     </div>
     <div id="content">
       <div id="left">
         <jdoc:include type="modules" name="left" />
       </div>
       <div id="main"><jdoc:include type="component" /></div>
     </div>
     <div id="footer"><jdoc:include type="modules" name="footer"/></div>
  </div>
</body>

body {
	background-image: url(../images/aluminium.jpg);
	background-repeat: repeat;
	margin: 0px;
	padding: 0px;
}
HTML, body {
	height: 100%;
}
#navbar {
	font-family: "Times New Roman";
	font-size: 24px;
	text-transform: uppercase;
	color: #FFF;
	background-color: #191919;
	height: 24px;
	width: 1000px;
	border-top-width: 1px;
	border-bottom-width: 1px;
	border-top-style: solid;
	border-bottom-style: solid;
	border-top-color: #D6D6D6;
	border-bottom-color: #D6D6D6;
}
#container {
	width: 1000px;
	margin-right: auto;
	margin-left: auto;
	height: 100%;
	min-height: 1500px;
	border: 1px solid #191919;
	overflow: visible;
}


#header {
	background-image: url(../images/header.jpg);
	height: 241px;
	width: 1000px;
}
#content {
	width: 1000px;
	min-height: 800px;
	height: 100%;
}
#navbar ul {
	margin: 0px;
	padding: 0px;
	width: 1000px;
	list-style-type: none;
}
#navbar ul li {
	display: inline;
	margin: 0px;
	border-right-width: 1px;
	border-right-style: solid;
	border-right-color: #d6d6d6;
}
#navbar ul li a {
	color: #FFF;
	text-decoration: none;
}
#left h3 {
	font-family: "Times New Roman";
	font-size: 18px;
	color: #FFF;
	background-color: #191919;
}
#left ul {
	margin: 0px;
	padding: 0px;
	list-style-type: none;
}
#left ul li {
	display: block;
	border-bottom-width: 1px;
	border-bottom-style: dashed;
	border-bottom-color: #191919;
}
#left ul li a {
	font-family: "Times New Roman";
	font-size: 16px;
	font-weight: bold;
	color: #191919;
	text-decoration: none;
}




#left {
	background-color: #ddd;
	float: left;
	width: 244px;
	min-height: 800px;
	border-right-width: 1px;
	border-right-style: dashed;
	border-right-color: #191919;
	height: 100%;
}
#footer {
	font-family: Arial;
	font-size: 12px;
	color: #FFF;
	background-color: #191919;
	height: 150px;
	width: 1000px;
	clear: both;
}


#main {
	font-size: 12px;
	float: right;
	width: 749px;
	min-height: 800px;
	font-family: Arial;
	background-color: #ddd;
	padding-right: 3px;
	padding-left: 3px;
}
#main a {
	color: #191919;
	text-decoration: underline;
}
#main a:hover {
	text-decoration: none;
}
.footer2 {
	display: none;
}
#left ul li:hover a {
	color: #404040;
}