$(document).ready(function() {
    $('table.alternating th:even').addClass('alternatingeven');
    $('table.alternating th:odd').addClass('alternatingodd');
    $('table.alternating tr:even td:even').addClass('alternatingeveneven');
    $('table.alternating tr:even td:odd').addClass('alternatingevenodd');
    $('table.alternating tr:odd td:even').addClass('alternatingoddeven');
    $('table.alternating tr:odd td:odd').addClass('alternatingoddodd');
}
);