nefunkčný script vo firefox

$(document).ready(function(){
    $('#typFarby').change(function(){
        $('#typFarbyPriplat option[value="0"]').attr('selected','selected');
    });
    
    $('#typFarbyPriplat').change(function(){
        $('#typFarby option[value="0"]').attr('selected','selected');
    });
});

<select name="typ_farby" class="typfarby" id="typFarby">
            <?php 
        $i = 0;
        foreach ($options['farby'] as $farbaa) {
            echo '<option value="'.$i.'" class="z70fstand-'.$i.'">'.$farbaa.'</option>';
            $i++;
        }
        ?>
    </select>

<select name="typ_farby_p" class="typfarbyp" id="typFarbyPriplat">
            <?php 
        $i = 0;
        foreach ($options['farby_p'] as $farbaap) {
            echo '<option value="'.$i.'" class="z70fpripl-'.$i.'">'.$farbaap.'</option>';
            $i++;
        }
        ?>
    </select>