$("input[type=text]").blur(function(event) {
    var el = $(this);
    var action = el.parents("form").attr("action");

    $.ajax({
        type: 'POST',
        url: action.replace("-submit", "-validate"),
        data: {
            name: el.attr('name'),
            value: el.val(),
        },
        success: function(data){
            if (data.errors)
            {
                el.next('.verror').remove();
                $.each(data["errors"], function(index, error) {
                        el.after('<label for="' + el.attr('id') + '" class="verror">' + error + '</p>');
                        //to, ze se pocita s poradim elementu a nekouka se tu na jmeno je mozna na povazenou
                });
            }else
            {
                //? bez problemu?
            }
        },
        error: function(XMLHttpRequest, textStatus, errorThrown)
        {
            //ooooops
        },
        dataType: 'json'
    });
});