document.observe('dom:loaded', function(){
    var bodyClass = $('html-body').classNames().toString();
    if (bodyClass == 'adminhtml-catalog-product-attribute-edit') {
        var map = {
            2: 3,       //DE
            1: 17,      //EN
            10: 18,     //FR
            11: 19,     //IT
            12: 20      //ES
        }

        var re = /option[value][(d+)][d+]/;

        $H(map).each(function(pair){
            var sourceLabel = $$('input[name="frontend_label[' + pair.key + ']"]')[0];
            var targetLabel = $$('input[name="frontend_label[' + pair.value + ']"]')[0];
            if (targetLabel.readAttribute('value') != sourceLabel.readAttribute('value')) {
                targetLabel.setAttribute('value', sourceLabel.readAttribute('value'));
                targetLabel.setStyle({backgroundColor: 'lightgreen'});
            }

            $$('input[name^="option[value]"][name$="[' + pair.key + ']"]').each(function(s){
                var sourceClass = s.readAttribute('name');
                var matches;
                if ((matches = re.exec(sourceClass)) !== null) {
                    if (matches.index === re.lastIndex) {
                        re.lastIndex++;
                    }
                    var sourceOption = s.readAttribute('value');
                    var targetOption = $$('input[name="option[value][' + matches[1] + '][' + pair.value + ']')[0];
                    if (targetOption.readAttribute('value') != sourceOption) {
                        targetOption.setAttribute('value', sourceOption);
                        targetOption.setStyle({backgroundColor: 'lightgreen'});
                    }
                }
            });
        });
    }
});