source: BMXNET_RPMS_dotNET_UTILITIES-BMX/branch/BMX41000/IHS BMX Framework/IndianHealthService.BMXNet.Doc/Help/Scripts/EventUtilities.js

        // attach a handler to a particular event on an element
        // in a browser-independent way
        function registerEventHandler (element, event, handler) {
                if (element.attachEvent) {
                        // MS registration model
                        element.attachEvent('on' + event, handler);
                } else if (element.addEventListener) {
                        // NN (W4C) regisration model
                        element.addEventListener(event, handler, false);
                } else {
                        // old regisration model as fall-back
                        element[event] = handler;
                }
        }

        // get a delegate that refers to an instance method
        function getInstanceDelegate (obj, methodName) {
                return( function(e) {
                        e = e || window.event;
                        return obj[methodName](e);
                } );
        }