mozilla-release/layout/reftests/native-theme/listbox-nonnative-when-styled.html

<!DOCTYPE HTML>
<body onload="dump('\nDEBUG-bug660226: ' + document.activeElement + '\n\n');">
<!-- these should make the select non-native -->
<select size="3" style="border-width: 0"></select>
<select size="3" style="border-width: 1px"></select>
<select size="3" style="border-width: 2px"></select>
<select size="3" style="border-width: 3px"></select>
<select size="3" style="border-width: 4px"></select>
<select size="3" style="border-width: 5px"></select>
<select size="3" style="border-width: 6px"></select>
<select size="3" style="border-style: dotted"></select>
<select size="3" style="border-color: green"></select>
<select size="3" style="background-color: transparent"></select>
<select size="3" style="background-color: white"></select>

<!-- these should let it stay native -->
<select size="3" style="color: black"></select>
<select size="3" style="font-weight: normal"></select>
</body>