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 /**
 * Adds mousewheel event support
 * @module event
 * @submodule event-mousewheel
 */
 var DOM_MOUSE_SCROLL = 'DOMMouseScroll',
 fixArgs = function(args) {
 var a = Y.Array(args, 0, true), target;
 if (Y.UA.gecko) {
 a[0] = DOM_MOUSE_SCROLL;
 target = Y.config.win;
 } else {
 target = Y.config.doc;
 }
 
 if (a.length < 3) {
 a[2] = target;
 } else {
 a.splice(2, 0, target);
 }
 
 return a;
 };
 
 /**
 * Mousewheel event. This listener is automatically attached to the
 * correct target, so one should not be supplied. Mouse wheel
 * direction and velocity is stored in the 'wheelDelta' field.
 * @event mousewheel
 * @param type {string} 'mousewheel'
 * @param fn {function} the callback to execute
 * @param context optional context object
 * @param args 0..n additional arguments to provide to the listener.
 * @return {EventHandle} the detach handle
 * @for YUI
 */
 Y.Env.evt.plugins.mousewheel = {
 on: function() {
 return Y.Event._attach(fixArgs(arguments));
 },
 
 detach: function() {
 return Y.Event.detach.apply(Y.Event, fixArgs(arguments));
 }
 };