Accesskeys for individual <option>s in a drop-down field?

Is it somehow possible to create a drop-down field similar to the following that allows the user to access each option of the drop-down menu individually by pressing a certain key combination.
<select name="type">
<option value="...">...</option>
<option value="...">...</option>
</select>

I know that <select accesskey="x"> will allow me to select the drop-down field as a whole, but not individual options.