I'm new at JQuery, what I wanted to ask is how to select an option, then another option will automatic selected that have property of first option.

I've given code like this:

<select name="kendaraan">
    <option value="" selected>pilih kendaraan!</option>
    <option value="B 2011 DR" class="B2011DR">B 2011 DR</option>
    <option value="R 3333 OKI" class="R3333OKI">R 3333 OKI</option>
    <option value="k03">jazz</option>
    <option value="k04">innova</option>
</select>

<select name="driver">
    <option value="" selected>pilih kendaraan!</option>
    <option value="s02" car="B2011DR" style="display:none">jojon</option>
    <option value="s01" car="B2011DR" style="display:none">mamat</option>
    <option value="s04" car="R3333OKI" style="display:none">tukul</option>
    <option value="s03" car="R3333OKI" style="display:none">mamat</option>
    <option value="s07" car="k03" style="display:none">bejo</option>
    <option value="s05" car="k03" style="display:none">mamat</option>
    <option value="s06" car="k03" style="display:none">tukul</option>
    <option value="s08" car="k04" style="display:none">budi</option>
    <option value="s09" car="">komeng</option>
</select>

$('select[name=kendaraan]').change(function() {
    //hide all option
    $('select[name=driver] option').css('display','none');
    //display option only for matched driver
    var isCar = $('select[name=driver] option[car='+$(this).val()+']');
    isCar.css('display','block');
    //auto select first matched diriver
    $('select[name=driver]').val( $(isCar[0]).val() )
})

But the jquery code is for getting the value of "kendaraan", how to match it with the class, not the value?