[рони]

Adigezalov,
или так

onclick="callBack(event)"

и так

function callBack(event) {
    var callbackName = $(event.target).parents('.callback-form').find('.callback-name');
    var callbackPhone = $(event.target).parents('.callback-form').find('.callback-phone');

    var name = $.trim(callbackName.val());
    var phone = $.trim(callbackPhone.val());


}

или так
onclick="callBack()"
и так

$(function() {
$(".callback-button").click(callBack)
});