<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<style type="text/css">
.multicol {
margin: 1em;
border: solid silver;
width: 300px;
-moz-column-width: 100px;
-moz-column-gap: 0;
height: 100px;
}
.step {
height: 10px;
border: 15px aqua;
border-style: none solid;
}
.float {
float: right;
width: 15px;
background: aqua;
height: 240px;
}
.L {
float: left;
}
.container {
width: 100%;
background: red;
}
.clear {
clear: left;
height: 0;
background: red;
}
.bar {
border-bottom: orange solid;
}
</style>
<p>The orange line should be halfway down the third column
(immediately after the end of the aqua lines).
<div class="multicol">
<div class="step"></div>
<div class="container">
<div class="float L"></div>
<div class="float R"></div>
</div>
<div class="clear"><div class="bar"></div></div>
</div>