<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<style type="text/css">
.multicol {
margin: 1em;
border: solid silver;
width: 500px;
-moz-column-width: 100px;
-moz-column-gap: 0;
height: 100px;
position: relative;
}
#clear {
top: 50px;
border-top: 4px solid orange;
width: 100%;
position: absolute;
z-index: -1;
}
.float {
border: aqua 30px;
border-style: none solid;
height: 300px;
}
.pad {
padding-top: 50px;
}
</style>
<body>
<div class="multicol">
<div id="clear"></div>
<div class="pad"></div>
<div class="float"> </div>
</div>