I've got a fairly simple page where I want to create something like this:
[------------------div - 100px filler color-----------------]
[------------------h1 - height 100px----------------------]
[--------------- div - 100%-(100px+100px)-------------]
The HTML I'm working with is:
<body>
    <div id="header">
    </div>
    <h1>Big Old Text</h1>
    <div id="footer">
    </div>
</body>
The CSS is:
body {
    margin: 0px;
    padding: 0px;
}
.background {
/*  background: url(rotate.php) no-repeat center fixed; */
    background: url(background_image_05.jpg) no-repeat center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}
#header {
    background-color: rgba(255,0,255,0.10);
    height: 100px;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
}
h1 {
    letter-spacing: 0.1em;
    font-size: 72px;
    text-align: center;
    padding-bottom: 25px;
    padding-top: 30px;
    display: block;
    position: relative;
    height: 100px
}
#footer {
    position: relative;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    background-color: rgba(255,0,255,0.10);
}
I don't want any scroll bars. I tried to modify a version of this earlier answer, but it's not quite working out the way I want it to.