<!DOCTYPE html>
<html style="font-family: ahem; font-size: 10px; -webkit-font-smoothing: none;">
<body>
<style>
#test1 { -webkit-column-count: 2; }
#test2 { -webkit-column-span: all; }
#test3 { content: counter(c); }
</style>
<script>
onload = function() {
test1 = document.createElement('div');
test1.setAttribute('id', 'test1');
document.body.appendChild(test1);
test2 = document.createElement('div');
test2.setAttribute('id', 'test2');
test1.appendChild(test2);
test3 = document.createElement('div');
test3.setAttribute('id', 'test3');
test1.appendChild(test3);
test4 = document.createElement('div');
test1.appendChild(test4);
test4.style.display = 'table-row-group';
test3.appendChild(document.createTextNode('3'));
test4.appendChild(document.createTextNode('4'));
document.body.offsetTop;
document.body.style.zoom = 2;
}
</script>
</body>
</html>