Na rychlo spachtene, nicmene hlavni je myslenka:
HTML kód:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  	
  
<html style="height: 100%; overflow: hidden;">
<head>

    <meta http-equiv="Content-type" content="text/html; charset=UTF-8" />
    <title>Pokus</title>

</head>

<body style="height: 100%; margin: 0; "> 

  <div style="float: left; width: 20%; background-color: green">
    Menu 1<br />
    Menu 2<br />
    Menu 3<br />
    Menu 4<br />
    Menu 5<br />
  </div>
  <div style="float: left; font-size: 10em; background-color: blue; overflow: auto; height: 100%; width: 80%;">
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
    blahblah<br />
  </div>

</body>
</html>
Viz. vice na http://www.jakpsatweb.cz/css/overflow.html i s priklady.