gistfile1.js

//Assume all code is wrapped within each respective library's DOMReady handler

//Scope-corrected callback in YUI 2
YAHOO.util.Event("id", "click", function(e) {
    this._methodName();
}, null, this);

//Scope-corrected callback in YUI 3
Y.on("click", function(e) {
    this._methodName();
}, "#id", this);

//Scope-corrected callback in jQuery 1.3.0
var that = this;
var cb = function(e) {
    this._methodName();
}
$("#id").click(function(e) { cb.call(this, e); }))

//Scope-corrected callback in jQuery 1.3.0 using hitch plugin
$("#id").click($.hitch(this, function(e) {
    this._methodName();
}));