• display: inline-block; 
nebo:
<HTML>
<div id="celek">
<div id="levy">
<article>
<p>clanek1<br/>
bla bla bla</p>
</article>
</div>
<div id="pravy">
<article>
<p>clanek2<br/>
bla bla bla</p>
</article>
</div>
</div>
<CSS>
#celek
{
overflow:auto;
}
#levy
{
float:left;
width:60%;
}
#pravy
{
overflow:auto;
}