<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function boom()
{
var y = document.createTextNode('Y');
document.body.insertBefore(y, document.getElementById("v").nextSibling);
}
</script>
</head>
<body onload="boom();" style="-moz-column-count: 2; width: 10ch; letter-spacing: 1px; font-family: monospace;">
<div style="background: lightblue; float: right; height: 14em; width: 1ch;" id="v"></div>a bcd<span>‫X</span>
</body>
</html>