I want to use a simple layout, sidebar, subsidebar and the main content, all columns need to be the same in height. Here's when I get stuk, the columns need to be min- screen height if they are empty, and if 1 column has an element/content the other columns need to be the same height.
// het idea
<div id="container">
needs to be min-heigth 100%
<div id="sidebar">
needs to be 40px width
</div>
<div id="subsidebar">
needs to be 200px width
</div>
<div id="content">
needs to be 100% width
<div class="some-element-is-3000">
3000px height(example)
</div>
</div>
</div>