Add an onchange event listener to an html input field

Question

I would like to add an onchange event to those input fields without jquery:

Answer 1

document.getElementById('cbid.wizard.1._latitude').onchange = function(){
   //do something
}

GlobalEventHandlers.onchange docs

or

document.getElementById('cbid.wizard.1._latitude').addEventListener("change", function(){
    //do something
});

EventTarget.addEventListener docs