This should do aprox what you want. But in all honestly, I dont recommend fixed or absolute positions. There really is only one rule, DON'T USE FIXED OR ABSOLUTE POSITIONS.
<html>
<head>
<title>My title</title>
<style type="text/css">
html {
width: 100%;
height: 100%;
}
body {
width: 100%;
height: 100%;
}
#topBar {
height: 25px;
width: 100%;
background-color: #ddd;
}
#contentContainer {
height: 250px;
width: 250px;
position: fixed;
left: 100px;
top: 100px;
}
</style>
</head>
<body>
<div id="topBar">Herp | derp | surp | nurp<>
<div id="contentContainer">This is my content<>
</body>
</html>
PS: You have to change the <> to </ d i v > (without spaces) in there, for whatever reason I am not allowed to post it..
