Creating events

function addEvent (obj, evType, fn, useCapture) {
    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, useCapture);
        return true;
    }
    else if (obj.attachEvent) {
        var r = obj.attachEvent("on"+evType, fn);
        return r;
    }
    else {
        return false;
    }
}

Stolen from Scott Andrew.

function doSomething(e) {
    var targ;
    if (!e) var e = window.event;
    if (e.target) targ = e.target;
    else if (e.srcElement) targ = e.srcElement;
    if (targ.nodeType == 3) targ = targ.parentNode;
}

Stolen from Peter-Paul Koch.