I think this is what you descriped. You can scroll your <body>
content like alwas and have a max-height fixed sidebar.
.container {
width: 100%;
height: 100%;
}
.navbar {
position: fixed;
height: 45px;
width: 100%;
background-color: #262626;
z-index: 9;
}
.main {
position: relative;
top: 45px;
width: 100%;
bottom:0;
}
.main-container {
width: 1200px;
margin: 0px auto;
background-color: #e9e9e9;
}
.main-container-center {
width: 600px;
top: 45px;
background-color: #e5e5e5;
}
.main-container-right {
position: fixed;
background-color: #d9d9d9;
width: 600px;
bottom:0;
margin-left: 600px;
overflow: auto;
top: 45px;
}