Layout, avec une sidebar fixe + contenu fluide.

-----------------------------------
|            |                    |
|  #sidebar  |    #maincontent    |
|  (fixe)    |    (fluide)        |
|            |                    |
-----------------------------------

.html

<body>
	<div id="sidebar"></div>
	<div id="maincontent"></div>
</body>

.css

body{
    margin: 0;
    padding: 0;
    border: 0;
    overflow: hidden;
    height: 100%; 
    max-height: 100%; 
}

#sidebar{
    position: absolute;
    top: 0;
    bottom: 0; 
    left: 0;
    width: 200px; /*Width of frame div*/
    height: 100%;
    overflow: hidden; /*Disable scrollbars. Set to "scroll" to enable*/
    background: navy;
    color: white;
}

#maincontent{
   position: fixed;
   top: 0; 
   left: 200px; /*Set left value to WidthOfFrameDiv*/
   right: 0;
   bottom: 0;
   overflow: auto; 
   background: #fff;
}