Hele, a co trebas takto:

Menu bude trvale na strance a text v "block" ti bude pri rolovani zajizdet pod vrhni menu.

Kód:
<body>
  
<div class="block">
nejaky hodne dlouhy text ;&#41;
</div>
<div class="top_menu">
  vrchni menu
</div>
<div class="left_menu">
  leve menu
</div>
</body>
++

Kód:
.left_menu &#123;
        position&#58; fixed;
        text-align&#58; center;
        overflow&#58; hidden;
        height&#58; 80%;
        top&#58; 5em;
        left&#58; 0em;
        width&#58; 9em;
        z-index&#58; 100;
        float&#58; left;
        background-color&#58; #66CC00;
&#125;


.top_menu &#123;
        position&#58; fixed;
        text-align&#58; center;
        overflow&#58; hidden;
        height&#58; 5em;
        width&#58; 100%;
        left&#58; 0em;
        top&#58; 0em;
        z-index&#58; 100;
        background-color&#58; #66CC00;
&#125;


.block &#123;
        position&#58; absolute;
        text-align&#58; justify;
        top&#58; 7em;
        left&#58; 9em;
        margin-left&#58; 5%;
        margin-right&#58; 5%;
        z-index&#58; 1;
&#125;