CIS 119 Detect key events

Code

document.onkeydown = handleDown;
document.onkeyup = handleUp;
document.onkeypress = handlePress;
function handlePress(evt) {
   var thiskey = evt ? evt.which : window.event.keyCode;
   var e = document.getElementById('content');
   e.innerHTML = e.innerHTML + "<br>Key pressed: " + thiskey;
}
function handleUp(evt) {
   var thiskey = evt ? evt.which : window.event.keyCode;
   var e = document.getElementById('content');
   e.innerHTML = e.innerHTML + "<br>Key up: " + thiskey;
}
function handleDown(evt) {
   var thiskey = evt ? evt.which : window.event.keyCode;
   var e = document.getElementById('content');
   e.innerHTML = e.innerHTML + "<br>Key down: " + thiskey;
}