<?xml version="1.0"?>
<select><optgroup label="Husbands"><option selected="selected" data-optgroup-idx="0" value="Fred">Fred</option><option data-optgroup-idx="0" value="Barney">Barney</option></optgroup><optgroup disabled="disabled" label="Wives"><option data-optgroup-idx="1" value="Wilma">Wilma</option><option data-optgroup-idx="1" value="Betty">Betty</option></optgroup></select>