Question

Im making a website http://nebkat.com/beta/index.php and there is a grey background and a white background for content(see for yourself). The problem is that I cant set the white part to be 100% height. It only stays up to the title(Welcome…) and then it stops.

Answer 1

Heights specified in % will not be honored by the browser (edit: I mean to say they wont work the way you expect them to).

You need a clearing div inside your <div id="container"> div. Here is where you should place it:

<div id="container">
    <div id="logo">...</div>
    <div id="menu">...</div>
    <div id="content">...</div>
    <!-- HERE -->
    <div style="clear: both;"></div>
</div>