$(function () {

    var $comments = $('.all_comments_wrap');
    var $trigger = $('.comments_trigger');

    $trigger.toggle(function () {
        $trigger.find('.do-hide').hide();
        $trigger.find('.do-show').show();
        $comments.hide('slow');
        return false;
    }, function () {
        $trigger.find('.do-show').hide();
        $trigger.find('.do-hide').show();
        $comments.show('slow');
        return false;
    });

    $trigger.trigger('click');

});