Answer 1

if you use addEventListener() to register event handler function, you could add how many you want:

x.addEventListener("click", function1);
x.addEventListener("click", function2);

(no need to create a third function to call your two others)

if you use event attribute/properties, you must create a third function wich call each of the function you want to run on event:

x.onclick = function(evt) {
function1.call(this,evt);
function2.call(this,evt);
};

however, you are obviously not mandatory to bind 'this' object and/or event object...

Answer 2

Hi ℋℜҜ
Yes, see below
x.addEventListener(“click”, function() {
function1();
function2();
}