<!DOCTYPE html>
<html>
<body>
<div style="display:-moz-deck">
<div>
<span style="float: right; width: 0;">x</span>
</div>
<div style="position: relative;">
<span style="float: right;">
<span style="position: absolute;">y</span>
</span>
</div>
</div>
</body>
</html>