Need help with CSS and DIVS

Hey there!

Ive got some question about CSS and Divs, first of all. im having coördination problems with my website, the problem is that 1. there is a diffrence in location if i look on firefox or internet explorer 6, now i know IE6 is crap but i still want my website to work in it since almost everyone uses it. :stare: and 2. I dont realy get the diffrence in the ways how to position my div. I know i could place it absolute but that doesnt work with auto centering wich i use.

The centering also brings us on the second problem. In IE6 it doesnt work :frowning: but it does in Firefox. I hope you guys can shine some light on this dark situation :dog:

a weblink to my site: http://members.lycos.nl/martijnpotman/ (note that im still designing and this is only the header), since i use lycos i get crappy ads but i cant find any other working free host, not even from the stiky :).

here is also the code from my html and css.

CSS:


/* CSS Document */

body {
background-color: #a0a0a0;
font: normal 11px Helvetica Neue, arial, verdana, sans-serif;
}

#bodyreplace {
width: 100%
}

#container {
width: 760px;
margin: 0px auto;
margin-top: 0px;
text-align: left;
position: relative;
}

#header {
height: 90px;
padding: 0px;
width: 760px;
background-color: #242424;
}

#logo {
    width: 220px;
    float: right;
    height: 90px;
}

#logo h1 {
    width: 220px;
    text-indent: -9999px;
    background: transparent url(../logo.jpg) center right no-repeat;
}

#logo a {
    width: 220px;
    height: 90px;
    display: block;
    text-decoration: none;
}

#header_tussen {
height: 4px;
width: 760px;
background-color: cfcfcf;
}

HTML


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<style type="text/css">
@import url(css/style.css);
</style>
</head>

<body>
<div id="bodyreplace">
<div id="container">

<div id="header">
<div id="logo">
<h1><a href="/">Index.html</a></h1>
</div>
</div>

<div id="header_tussen">
</div>

</div>
</div>
</body>
</html>

Thanks in Advance![/quote]
[COLOR=DarkOrange]edit>> here a screen of what it should look like:[/COLOR]