At my page i have a navigation bar to the left that is 100% height and 25% width.
It is working fine, but when there's scroll available, it destroys the background, and make it look ugly. The reason i think is that 100% height is only applied to the active window.
What is the trick to have a div 100% height always, even if the user is scrolling?

Css of the navigation:

```
    width:25%;
    height:100%;
    float:left;
    color:#999999;

```

I have tried position:absolute with no results, also tried clear both.
Need help :)

[Fiddle](http://jsfiddle.net/Sa6cb/)