JAVASCRIPT
var button = document.querySelector('button'), timer;
button.addEventListener("mousedown", function() {
timer = setTimeout(function() {
button.innerHTML = 'hold';
timer = null;
}, 2000); // hold 2 second(s)
}, false);
button.addEventListener("mouseup", function() {
if (timer) {
button.innerHTML = 'click';
}
clearTimeout(timer);
}, false);
