gistfile1.txt

document.addEventListener('focus', prepareHandler, true);  // capture phase
input.addEventListener('focus', inputHandler, false);

function prepareHandler(e) {
    var id = e.target.id;
    process[id] = true;

    setTimeout(function () {
        if (process[id]) {
            // do stuff (e is available, but its methods are useless)
        }
    }, 10);
}

function inputHandler(e) {
    var id = e.target.id;
    if (/* some condition */) {
        process[id] = false;
        e.stopImmediatePropagation();
        e.preventDefault();
    }
}