<!DOCTYPE HTML> <div style="position:relative"> <!-- mask the dropdown button --> <div style="position:absolute; width:50px; left:7px; top:0; bottom:0; background:black;"></div> <!-- these should make the select non-native --> <select size="1" style="-moz-appearance: none; border-width: 0"></select><br> <select size="1" style="-moz-appearance: none; border-width: 1px"></select><br> <select size="1" style="-moz-appearance: none; border-width: 2px"></select><br> <select size="1" style="-moz-appearance: none; border-width: 3px"></select><br> <select size="1" style="-moz-appearance: none; border-width: 4px"></select><br> <select size="1" style="-moz-appearance: none; border-width: 5px"></select><br> <select size="1" style="-moz-appearance: none; border-width: 6px"></select><br> <select size="1" style="-moz-appearance: none; border-style: dotted"></select><br> <select size="1" style="-moz-appearance: none; border-color: green"></select><br> <select size="1" style="-moz-appearance: none; background-color: transparent"></select><br> <select size="1" style="-moz-appearance: none; background-color: white"></select><br> </div> <!-- these should let it stay native --> <select size="1"></select> <select size="1"></select>