src/javascript/core/utils/Events.js
function(obj, name, callback, key) {
		var func, events;
					
		name = name.toLowerCase();

		// Add event listener
		if (obj.addEventListener) {
			func = callback;
			
			obj.addEventListener(name, func, false);
		} else if (obj.attachEvent) {
			func = function() {
				var evt = window.event;

				if (!evt.target) {
					evt.target = evt.srcElement;
				}

				evt.preventDefault = preventDefault;
				evt.stopPropagation = stopPropagation;

				callback(evt);
			};

			obj.attachEvent('on' + name, func);
		}
		
		// Log event handler to objects internal mOxie registry
		if (!obj[uid]) {
			obj[uid] = Basic.guid();
		}
		
		if (!eventhash.hasOwnProperty(obj[uid])) {
			eventhash[obj[uid]] = {};
		}
		
		events = eventhash[obj[uid]];
		
		if (!events.hasOwnProperty(name)) {
			events[name] = [];
		}
				
		events[name].push({
			func: func,
			orig: callback, // store original callback for IE
			key: key
		});
	}
function(obj, name, callback, key) {
		var func, events;
					
		name = name.toLowerCase();

		// Add event listener
		if (obj.addEventListener) {
			func = callback;
			
			obj.addEventListener(name, func, false);
		} else if (obj.attachEvent) {
			func = function() {
				var evt = window.event;

				if (!evt.target) {
					evt.target = evt.srcElement;
				}

				evt.preventDefault = preventDefault;
				evt.stopPropagation = stopPropagation;

				callback(evt);
			};

			obj.attachEvent('on' + name, func);
		}
		
		// Log event handler to objects internal mOxie registry
		if (!obj[uid]) {
			obj[uid] = Basic.guid();
		}
		
		if (!eventhash.hasOwnProperty(obj[uid])) {
			eventhash[obj[uid]] = {};
		}
		
		events = eventhash[obj[uid]];
		
		if (!events.hasOwnProperty(name)) {
			events[name] = [];
		}
				
		events[name].push({
			func: func,
			orig: callback, // store original callback for IE
			key: key
		});
	}
Adds an event handler to the specified object and store reference to the handler
in objects internal Plupload registry (@see removeEvent).

@method addEvent
@static
@param {Object} obj DOM element like object to add handler to.
@param {String} name Name to add event listener to.
@param {Function} callback Function to call when event occurs.
@param {String} [key] that might be used to add specifity to the event record.