var frameListenerNotAdded = true,
    checkMessengerFrame = setInterval(function() {
        if (frameListenerNotAdded && frames['carrot-messenger-frame']!=null) {
            addFrameListener();
            frameListenerNotAdded = false;
        }
        if (!frameListenerNotAdded && frames['carrot-messenger-frame']==null) {
            frameListenerNotAdded = true;
        }
    }, 1000);

function addFrameListener() {
    var iframe = document.querySelector('#carrot-messenger-frame'),
        frameWindow = iframe.contentWindow,
        frameDoc = iframe.contentDocument || frameWindow.document;
    frameDoc.addEventListener('click', function(e) {
        if (e.target.matches('a[href*="livesklad.com/help"], a[href*="livesklad.com/help"] *')) {
            top.carrotquest.track('Перешел в Help из чата');
        }
    });
}

function getClosest(el, s) {
    var r = undefined;
    while (el) {
        if (el.matches(s)) {
            r = el;
            break;
        } else if (el.tagName.toLowerCase()=='body') {
            break;
        };
        el = el.parentElement;
    };
    return r;
};