JavaScript: RusToTranslit

rus_to_translit

function RusToTranslit( text ) {
    return text.replace(/([а-яё])|([\s_-])|([^a-z\d])/gi,
        function(all, ch, space, words, i) {
            if (space || words) {
                return space ? '-' : '';
            }

            var code = ch.charCodeAt(0),
                next = text.charAt(i+1),
                index = code == 1025 || code == 1105 ? 0 : code > 1071 ? code - 1071 : code - 1039,
                t = ['yo','a','b','v','g','d','e','zh','z','i','y','k','l','m','n','o','p','r','s','t','u','f','h','c','ch','sh','shch','','y','','e','yu','ya'],
                next = next && next.toUpperCase() === next ? 1 : 0;

            return ch.toUpperCase() === ch
                    ? next 
                        ? t[index].toUpperCase() 
                        : t[index].substr(0,1).toUpperCase() + t[index].substring(1)
                    : t[index];
        }
    );
}