W3C DOM Event Propagation
function init() {
window.onclick = winEvent;
document.onclick = docEvent;
document.body.onclick = docBodEvent;
document.addEventListener("click", docEvent, true);
document.forms[0].addEventListener("click", formCaptureEvent, true);
document.forms[0].addEventListener("click", formBubbleEvent, false);
}
function winEvent(evt) {
alert("window object level (" + getPhase(evt) + ").");
}
function docEvent(evt) {
alert("Document level (" + getPhase(evt) + ").");
}
function docBodEvent(evt) {
alert("BODY level (" + getPhase(evt) + ").");
}
function formCaptureEvent(evt) {
alert("FORM only on CAPTURE.");
}
function formBubbleEvent(evt) {
alert("FORM only on BUBBLE.");
}
function getPhase(evt) {
switch (evt.eventPhase) {
case 1:
return "CAPTURING";
break;
case 2:
return "AT TARGET";
break;
case 3:
return "BUBBLING";
break;
default:
return "";
}
}