<!DOCTYPE html>
<script>
onload = function() {
var elm = document.getElementById('elm');
document.body.offsetTop; // trigger layout
elm.style.webkitColumnSpan = 'all';
}
</script>
<p>Test that a regular block can become a spanner.</p>
<p>Below there should be a blue box, then a yellow box, then a blue box again.</p>
<div style="-webkit-columns:2; -webkit-column-gap:0; line-height:2em; background:blue;">
<div id="elm" style="margin:4em 0; background:yellow;"><br><br></div>
</div>