Gracias por la info impostor, a ver si con el código se puede solucionar, da gusto la ayuda que aquí se proporciona.
HTML:
<!DOCTYPE html
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" .w3.org/TR/html40/strict.dtd">
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="author" content="1&1 Editor Web"><meta name="description" content="Un sitio web para la edición de sitios"><title>Página principal - Un sitio web para la edición de sitios</title><link rel="stylesheet" type="text/css" media="all" href="main.css"><link rel="stylesheet" type="text/css" media="all" href="colorschemes/colorscheme1/colorscheme.css"><link rel="stylesheet" type="text/css" media="all" href="style.css"><script type="text/javascript" src="live_tinc.js"></script></head><body id="main_body"><div id="container"><div id="header"><div xmlns:wal=schlund.de/webfix/assignmentLanguage" id="key_visual" wal:element="keyvisual"> </div><div xmlns:wal=schlund.de/webfix/assignmentLanguage" id="text_caption" wal:element="caption"><div id="extra_div1">Tarot</div><div id="extra_div2"></div></div><div id="logo"><a href="index.html"></a></div></div><div id="main_container"><div id="left_column_container"><div id="main_nav_container"><ul id="main_nav_list"><li><a class="main_nav_active_item" href="index.html"><span class="main_nav_active_item_text">Página principal</span></a></li><li><a class="main_nav_item" href="2.html"><span class="main_nav_item_text">prueba 2</span></a></li><li><a class="main_nav_item" href="3.html"><span class="main_nav_item_text">prueba</span></a></li></ul></div><div id="sub_container1"><div id="extra_div4"></div></div></div><div id="sub_container2"><div xmlns:wal=schlund.de/webfix/assignmentLanguage" class="content" id="content_container" wal:element="content"><br>
<div class="content" id="content_container"><br><br>
</div>
</div></div></div><div id="footer"><div id="footer_text"></div></div></div><!-- wfxbuild / 1.0 / layout4-4 / 2009-12-01 09:45:39 CET--></body></html>
MAIN.CSS
styles for specific classes and ids
----------------------------------------------------------------------------*/
/*-- global container ------------------------------------------------------*/
#container {
position: relative;
padding: 0;
margin: 0 auto;
text-align: left;
width: 735px;
}
/*--- header ---------------------------------------------------------------*/
#header {
padding: 0;
margin: 0;
width: 735px;
height: 310px;
top: 0px;
left: 0px;
}
/*--- key visual -----------------------------------------------------------*/
#key_visual {
position: absolute;
top: 45px;
left: 2px;
width: 730px;
height: 272px;
}
/*--- caption (as text or background image) --------------------------------*/
#text_caption {
position: absolute;
top: 25px;
left: 0px;
}
#extra_div1 {
position: relative;
top: 5px;
left: 0px;
padding-left: 100px;
height: 20px;
}
#extra_div2 {
position: absolute;
top: 0px;
left: 2px;
width: 90px;
height: 34px;
}
/*--- logo -----------------------------------------------------------------*/
#logo {
width: 283px;
height: 56px;
position: absolute;
top: 265px;
left: 440px;
}
#left_column_container {
padding: 0;
margin-top: 25px;
float: left;
width: 190px;
}
#sub_container1 {
/*
height: 381px;
margin-top: 20px;
margin-left: 10px;
padding: 0;
border-width: thin;
border-style: solid;
border-color: #0000ff;
*/
width: 95px;
margin: 0 0 0 10px;
padding: 0;
}
#sub_container2 {
/*
border-width: thin;
border-style: solid;
border-color: #00ff00;
*/
/*width: 735px;*/
float: right;
/*margin-top: 50px;*/
margin: 15px 15px 15px 0;
padding: 0;
width: 510px;
}
#extra_div4 {
/*
border-width: thin;
border-style: solid;
border-color: #ff0000;
*/
height: 381px;
width: 95px;
margin: 0 0 0 10px;
padding: 0;
}
/*--- main navigation ------------------------------------------------------*/
#main_nav_container {
margin: 0 0 0 8px;
padding: 0;
}
#main_nav_list {
border: 0;
padding: 0;
margin: 0;
list-style-type: none;
}
#main_nav_list li {
margin: 3px 0 2px 0;
padding: 0;
}
/*--- main navigation items ------------------------------------------------*/
#main_nav_list a {
display: block;
text-align: left;
line-height: 24px;
height: 28px;
width: 165px;
padding-left: 12px;
overflow: hidden;
}
#main_nav_list a:hover {
text-decoration: none;
}
/*--- subnavigation --------------------------------------------------------*/
.sub_nav_container {
z-index: 1;
position: relative;
top: 5px;
left: 0px;
float: right;
width: 544px;
padding: 0;
margin: 0;
overflow: hidden;
min-height: 23px;
}
.sub_nav_list {
position: relative;
width: 530px;
margin: 0;
padding: 0;
top: -2px;
left: 26px;
list-style-type: none;
}
.sub_nav_list li {
text-decoration: none;
float: left;
margin: 0;
padding: 0;
}
/*--- subnavigation items --------------------------------------------------*/
.sub_nav_list a {
overflow: hidden;
width: 120px;
height: 23px;
line-height: 23px;
background: transparent;
padding: 0;
margin: 0;
text-align: center;
overflow: hidden;
float: left;
}
.sub_nav_list a:hover {
background: transparent;
text-decoration: none;
}
a.sub_nav_active_item {
text-decoration: none;
}
/*--- content --------------------------------------------------------------*/
#content_container {
overflow: hidden;
margin: 0;
padding: 0;
line-height: 1.2;
width: 510px;
}
#content_container table {
border-style: solid;
border-width: 1px;
border-spacing: 1px;
}
#content_container tr.odd {
font-size: 90%;
}
#content_container tr.even {
font-size: 90%;
}
/*--- footer ---------------------------------------------------------------*/
#footer {
margin: 0;
padding: 0;
width: 735px;
height: 79px;
clear: both;
}
#footer_text {
font-family: Verdana,Arial,Trebuchet MS,Tahoma,sans-serif;
padding: 10px 0 0 0;
margin: 0 30px 0 30px;
text-align: center;
font-size: 80%;
}
/*----------------------------------------------------------------------------
default-styles for html-elements
----------------------------------------------------------------------------*/
/*--- body -----------------------------------------------------------------*/
body#main_body {
margin: 0;
padding: 0;
text-align: center;
}
/*--- paragraph ------------------------------------------------------------*/
#content_container p {
margin: 5px 0 20px 0;
padding: 0;
font-size: 90%;
line-height: 1.2;
}
/*--- headings -------------------------------------------------------------*/
#content_container h1 {
font-family: Verdana,Arial,Trebuchet MS,Tahoma,sans-serif;
font-style: normal;
font-size: 140%;
font-weight: bold;
}
#content_container h2 {
font-family: Verdana,Arial,Trebuchet MS,Tahoma,sans-serif;
font-style: normal;
font-size: 130%;
font-weight: bold;
}
#content_container h3 {
font-family: Verdana,Arial,Trebuchet MS,Tahoma,sans-serif;
font-style: normal;
font-size: 100%;
font-weight: bold;
}
/*--- links ----------------------------------------------------------------*/
#content_container a:hover {
text-decoration : none;
}
/*--- tables ---------------------------------------------------------------*/
table {
}
th {
}
tr {
}
td {
}
/*--- forms ----------------------------------------------------------------*/
fieldset {
padding: 15px;
border-style: solid;
border-width: 1px;
}
input {
border-style: solid;
border-width: 1px;
}
textarea {
border-style: solid;
border-width: 1px;
}
button {
}
label {
}
select {
}
option {
}
/*--- lists ----------------------------------------------------------------*/
ul {
}
li {
}
/*--------------------------------------------------------------------------*/
También traia un style.css si hace falta lo posteo, no lo pongo por no hacer inmenso el post,
muchas gracias de nuevo por la ayuda,
Un saludo
Respuesta: barras laterales 
Respuesta: barras laterales 
