attempt at mapping jQuery.fn.on to old jQuery versions (namely 1.4.4)

jquery.events.js

(function(){
var rkeyEvent = /^key/,
  rmouseEvent = /^(?:mouse|contextmenu)|click/,
  rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
  rtypenamespace = /^([^.]*)(?:\.(.+)|)$/,
  core_rnotwhite = /\S+/g,
  whitespace = "[\\x20\\t\\r\\n\\f]",
  core_deletedIds = [],
  core_slice = core_deletedIds.slice,
  core_version = "@VERSION";

jQuery._data = jQuery.data;

jQuery.expr.match.needsContext = new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
      whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" );

jQuery.expando = "jQuery" + ( core_version + Math.random() ).replace( /\D/g, "" );

jQuery.hasData = function(elem) {
  elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
  return !!elem && !isEmptyDataObject( elem );
};

jQuery.isEmptyObject = function (obj) {
  var name;
  for (name in obj) {
    return false;
  }
  return true;
};

function isEmptyDataObject(obj) {
  var name;
  for (name in obj) {
    if (name ==="data" && jQuery.isEmptyObject(obj[name])) {
      continue;
    }
    if (name !== "toJSON") {
      return false;
    }
  }
  return true;
}

function returnTrue() {
  return true;
}

function returnFalse() {
  return false;
}

/*
 * Helper functions for managing events -- not part of the public interface.
 * Props to Dean Edwards' addEvent library for many of the ideas.
 */
jQuery.event = {

  global: {},

  add: function( elem, types, handler, data, selector ) {

    var handleObjIn, eventHandle, tmp,
      events, t, handleObj,
      special, handlers, type, namespaces, origType,
      elemData = jQuery._data( elem );

    // Don't attach events to noData or text/comment nodes (but allow plain objects)
    if ( !elemData ) {
      return;
    }

    // Caller can pass in an object of custom data in lieu of the handler
    if ( handler.handler ) {
      handleObjIn = handler;
      handler = handleObjIn.handler;
      selector = handleObjIn.selector;
    }

    // Make sure that the handler has a unique ID, used to find/remove it later
    if ( !handler.guid ) {
      handler.guid = jQuery.guid++;
    }

    // Init the element's event structure and main handler, if this is the first
    if ( !(events = elemData.events) ) {
      events = elemData.events = {};
    }
    if ( !(eventHandle = elemData.handle) ) {
      eventHandle = elemData.handle = function( e ) {
        // Discard the second event of a jQuery.event.trigger() and
        // when an event is called after a page has unloaded
        return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ?
          jQuery.event.dispatch.apply( eventHandle.elem, arguments ) :
          undefined;
      };
      // Add elem as a property of the handle fn to prevent a memory leak with IE non-native events
      eventHandle.elem = elem;
    }

    // Handle multiple events separated by a space
    types = ( types || "" ).match( core_rnotwhite ) || [""];
    t = types.length;
    while ( t-- ) {
      tmp = rtypenamespace.exec( types[t] ) || [];
      type = origType = tmp[1];
      namespaces = ( tmp[2] || "" ).split( "." ).sort();

      // If event changes its type, use the special event handlers for the changed type
      special = jQuery.event.special[ type ] || {};

      // If selector defined, determine special event api type, otherwise given type
      type = ( selector ? special.delegateType : special.bindType ) || type;

      // Update special based on newly reset type
      special = jQuery.event.special[ type ] || {};

      // handleObj is passed to all event handlers
      handleObj = jQuery.extend({
        type: type,
        origType: origType,
        data: data,
        handler: handler,
        guid: handler.guid,
        selector: selector,
        needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
        namespace: namespaces.join(".")
      }, handleObjIn );

      // Init the event handler queue if we're the first
      if ( !(handlers = events[ type ]) ) {
        handlers = events[ type ] = [];
        handlers.delegateCount = 0;

        // Only use addEventListener if the special events handler returns false
        if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
          if ( elem.addEventListener ) {
            elem.addEventListener( type, eventHandle, false );
          }
        }
      }

      if ( special.add ) {
        special.add.call( elem, handleObj );

        if ( !handleObj.handler.guid ) {
          handleObj.handler.guid = handler.guid;
        }
      }

      // Add to the element's handler list, delegates in front
      if ( selector ) {
        handlers.splice( handlers.delegateCount++, 0, handleObj );
      } else {
        handlers.push( handleObj );
      }

      // Keep track of which events have ever been used, for event optimization
      jQuery.event.global[ type ] = true;
    }

    // Nullify elem to prevent memory leaks in IE
    elem = null;
  },

  // Detach an event or set of events from an element
  remove: function( elem, types, handler, selector, mappedTypes ) {

    var j, origCount, tmp,
      events, t, handleObj,
      special, handlers, type, namespaces, origType,
      elemData = jQuery.hasData( elem ) && jQuery._data( elem );

    if ( !elemData || !(events = elemData.events) ) {
      return;
    }

    // Once for each type.namespace in types; type may be omitted
    types = ( types || "" ).match( core_rnotwhite ) || [""];
    t = types.length;
    while ( t-- ) {
      tmp = rtypenamespace.exec( types[t] ) || [];
      type = origType = tmp[1];
      namespaces = ( tmp[2] || "" ).split( "." ).sort();

      // Unbind all events (on this namespace, if provided) for the element
      if ( !type ) {
        for ( type in events ) {
          jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
        }
        continue;
      }

      special = jQuery.event.special[ type ] || {};
      type = ( selector ? special.delegateType : special.bindType ) || type;
      handlers = events[ type ] || [];
      tmp = tmp[2] && new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" );

      // Remove matching events
      origCount = j = handlers.length;
      while ( j-- ) {
        handleObj = handlers[ j ];

        if ( ( mappedTypes || origType === handleObj.origType ) &&
          ( !handler || handler.guid === handleObj.guid ) &&
          ( !tmp || tmp.test( handleObj.namespace ) ) &&
          ( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
          handlers.splice( j, 1 );

          if ( handleObj.selector ) {
            handlers.delegateCount--;
          }
          if ( special.remove ) {
            special.remove.call( elem, handleObj );
          }
        }
      }

      // Remove generic event handler if we removed something and no more handlers exist
      // (avoids potential for endless recursion during removal of special event handlers)
      if ( origCount && !handlers.length ) {
        if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
          jQuery.removeEvent( elem, type, elemData.handle );
        }

        delete events[ type ];
      }
    }

    // Remove the expando if it's no longer used
    if ( jQuery.isEmptyObject( events ) ) {
      delete elemData.handle;

      // removeData also checks for emptiness and clears the expando if empty
      // so use it instead of delete
      jQuery._removeData( elem, "events" );
    }
  },

  trigger: function( event, data, elem, onlyHandlers ) {

    var i, cur, tmp, bubbleType, ontype, handle, special,
      eventPath = [ elem || document ],
      type = event.type || event,
      namespaces = event.namespace ? event.namespace.split(".") : [];

    cur = tmp = elem = elem || document;

    // Don't do events on text and comment nodes
    if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
      return;
    }

    // focus/blur morphs to focusin/out; ensure we're not firing them right now
    if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
      return;
    }

    if ( type.indexOf(".") >= 0 ) {
      // Namespaced trigger; create a regexp to match event type in handle()
      namespaces = type.split(".");
      type = namespaces.shift();
      namespaces.sort();
    }
    ontype = type.indexOf(":") < 0 && "on" + type;

    // Caller can pass in a jQuery.Event object, Object, or just an event type string
    event = event[ jQuery.expando ] ?
      event :
      new jQuery.Event( type, typeof event === "object" && event );

    event.isTrigger = true;
    event.namespace = namespaces.join(".");
    event.namespace_re = event.namespace ?
      new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" ) :
      null;

    // Clean up the event in case it is being reused
    event.result = undefined;
    if ( !event.target ) {
      event.target = elem;
    }

    // Clone any incoming data and prepend the event, creating the handler arg list
    data = data == null ?
      [ event ] :
      jQuery.makeArray( data, [ event ] );

    // Allow special events to draw outside the lines
    special = jQuery.event.special[ type ] || {};
    if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
      return;
    }

    // Determine event propagation path in advance, per W3C events spec (#9951)
    // Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
    if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {

      bubbleType = special.delegateType || type;
      if ( !rfocusMorph.test( bubbleType + type ) ) {
        cur = cur.parentNode;
      }
      for ( ; cur; cur = cur.parentNode ) {
        eventPath.push( cur );
        tmp = cur;
      }

      // Only add window if we got to document (e.g., not plain obj or detached DOM)
      if ( tmp === (elem.ownerDocument || document) ) {
        eventPath.push( tmp.defaultView || tmp.parentWindow || window );
      }
    }

    // Fire handlers on the event path
    i = 0;
    while ( (cur = eventPath[i++]) && !event.isPropagationStopped() ) {

      event.type = i > 1 ?
        bubbleType :
        special.bindType || type;

      // jQuery handler
      handle = ( jQuery._data( cur, "events" ) || {} )[ event.type ] && jQuery._data( cur, "handle" );
      if ( handle ) {
        handle.apply( cur, data );
      }

      // Native handler
      handle = ontype && cur[ ontype ];
      if ( handle && jQuery.acceptData( cur ) && handle.apply && handle.apply( cur, data ) === false ) {
        event.preventDefault();
      }
    }
    event.type = type;

    // If nobody prevented the default action, do it now
    if ( !onlyHandlers && !event.isDefaultPrevented() ) {

      if ( (!special._default || special._default.apply( elem.ownerDocument, data ) === false) &&
        !(type === "click" && jQuery.nodeName( elem, "a" )) && jQuery.acceptData( elem ) ) {

        // Call a native DOM method on the target with the same name name as the event.
        // Don't do default actions on window, that's where global variables be (#6170)
        if ( ontype && jQuery.isFunction( elem[ type ] ) && !jQuery.isWindow( elem ) ) {

          // Don't re-trigger an onFOO event when we call its FOO() method
          tmp = elem[ ontype ];

          if ( tmp ) {
            elem[ ontype ] = null;
          }

          // Prevent re-triggering of the same event, since we already bubbled it above
          jQuery.event.triggered = type;
          elem[ type ]();
          jQuery.event.triggered = undefined;

          if ( tmp ) {
            elem[ ontype ] = tmp;
          }
        }
      }
    }

    return event.result;
  },

  dispatch: function( event ) {

    // Make a writable jQuery.Event from the native event object
    event = jQuery.event.fix( event );

    var i, j, ret, matched, handleObj,
      handlerQueue = [],
      args = core_slice.call( arguments ),
      handlers = ( jQuery._data( this, "events" ) || {} )[ event.type ] || [],
      special = jQuery.event.special[ event.type ] || {};

    // Use the fix-ed jQuery.Event rather than the (read-only) native event
    args[0] = event;
    event.delegateTarget = this;

    // Call the preDispatch hook for the mapped type, and let it bail if desired
    if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
      return;
    }

    // Determine handlers
    handlerQueue = jQuery.event.handlers.call( this, event, handlers );

    // Run delegates first; they may want to stop propagation beneath us
    i = 0;
    while ( (matched = handlerQueue[ i++ ]) && !event.isPropagationStopped() ) {
      event.currentTarget = matched.elem;

      j = 0;
      while ( (handleObj = matched.handlers[ j++ ]) && !event.isImmediatePropagationStopped() ) {

        // Triggered event must either 1) have no namespace, or
        // 2) have namespace(s) a subset or equal to those in the bound event (both can have no namespace).
        if ( !event.namespace_re || event.namespace_re.test( handleObj.namespace ) ) {

          event.handleObj = handleObj;
          event.data = handleObj.data;

          ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
              .apply( matched.elem, args );

          if ( ret !== undefined ) {
            if ( (event.result = ret) === false ) {
              event.preventDefault();
              event.stopPropagation();
            }
          }
        }
      }
    }

    // Call the postDispatch hook for the mapped type
    if ( special.postDispatch ) {
      special.postDispatch.call( this, event );
    }

    return event.result;
  },

  handlers: function( event, handlers ) {
    var i, matches, sel, handleObj,
      handlerQueue = [],
      delegateCount = handlers.delegateCount,
      cur = event.target;

    // Find delegate handlers
    // Black-hole SVG <use> instance trees (#13180)
    // Avoid non-left-click bubbling in Firefox (#3861)
    if ( delegateCount && cur.nodeType && (!event.button || event.type !== "click") ) {

      for ( ; cur != this; cur = cur.parentNode || this ) {

        // Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
        if ( cur.disabled !== true || event.type !== "click" ) {
          matches = [];
          for ( i = 0; i < delegateCount; i++ ) {
            handleObj = handlers[ i ];

            // Don't conflict with Object.prototype properties (#13203)
            sel = handleObj.selector + " ";

            if ( matches[ sel ] === undefined ) {
              matches[ sel ] = handleObj.needsContext ?
                jQuery( sel, this ).index( cur ) >= 0 :
                jQuery.find( sel, this, null, [ cur ] ).length;
            }
            if ( matches[ sel ] ) {
              matches.push( handleObj );
            }
          }
          if ( matches.length ) {
            handlerQueue.push({ elem: cur, handlers: matches });
          }
        }
      }
    }

    // Add the remaining (directly-bound) handlers
    if ( delegateCount < handlers.length ) {
      handlerQueue.push({ elem: this, handlers: handlers.slice( delegateCount ) });
    }

    return handlerQueue;
  },

  // Includes some event props shared by KeyEvent and MouseEvent
  props: "altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),

  fixHooks: {},

  keyHooks: {
    props: "char charCode key keyCode".split(" "),
    filter: function( event, original ) {

      // Add which for key events
      if ( event.which == null ) {
        event.which = original.charCode != null ? original.charCode : original.keyCode;
      }

      return event;
    }
  },

  mouseHooks: {
    props: "button buttons clientX clientY offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
    filter: function( event, original ) {
      var eventDoc, doc, body,
        button = original.button;

      // Calculate pageX/Y if missing and clientX/Y available
      if ( event.pageX == null && original.clientX != null ) {
        eventDoc = event.target.ownerDocument || document;
        doc = eventDoc.documentElement;
        body = eventDoc.body;

        event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
        event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
      }

      // Add which for click: 1 === left; 2 === middle; 3 === right
      // Note: button is not normalized, so don't use it
      if ( !event.which && button !== undefined ) {
        event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
      }

      return event;
    }
  },

  fix: function( event ) {
    if ( event[ jQuery.expando ] ) {
      return event;
    }

    // Create a writable copy of the event object and normalize some properties
    var i, prop,
      originalEvent = event,
      fixHook = jQuery.event.fixHooks[ event.type ] || {},
      copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;

    event = new jQuery.Event( originalEvent );

    i = copy.length;
    while ( i-- ) {
      prop = copy[ i ];
      event[ prop ] = originalEvent[ prop ];
    }

    // Support: Chrome 23+, Safari?
    // Target should not be a text node (#504, #13143)
    if ( event.target.nodeType === 3 ) {
      event.target = event.target.parentNode;
    }

    return fixHook.filter? fixHook.filter( event, originalEvent ) : event;
  },

  special: {
    load: {
      // Prevent triggered image.load events from bubbling to window.load
      noBubble: true
    },
    click: {
      // For checkbox, fire native event so checked state will be right
      trigger: function() {
        if ( this.type === "checkbox" && this.click && jQuery.nodeName( this, "input" ) ) {
          this.click();
          return false;
        }
      }
    },
    focus: {
      // Fire native event if possible so blur/focus sequence is correct
      trigger: function() {
        if ( this !== document.activeElement && this.focus ) {
          this.focus();
          return false;
        }
      },
      delegateType: "focusin"
    },
    blur: {
      trigger: function() {
        if ( this === document.activeElement && this.blur ) {
          this.blur();
          return false;
        }
      },
      delegateType: "focusout"
    },

    beforeunload: {
      postDispatch: function( event ) {

        // Support: Firefox 10+
        if ( event.result !== undefined ) {
          event.originalEvent.returnValue = event.result;
        }
      }
    }
  },

  simulate: function( type, elem, event, bubble ) {
    // Piggyback on a donor event to simulate a different one.
    // Fake originalEvent to avoid donor's stopPropagation, but if the
    // simulated event prevents default then we do the same on the donor.
    var e = jQuery.extend(
      new jQuery.Event(),
      event,
      { type: type,
        isSimulated: true,
        originalEvent: {}
      }
    );
    if ( bubble ) {
      jQuery.event.trigger( e, null, elem );
    } else {
      jQuery.event.dispatch.call( elem, e );
    }
    if ( e.isDefaultPrevented() ) {
      event.preventDefault();
    }
  }
};

jQuery.removeEvent = function( elem, type, handle ) {
  if ( elem.removeEventListener ) {
    elem.removeEventListener( type, handle, false );
  }
};

jQuery.Event = function( src, props ) {
  // Allow instantiation without the 'new' keyword
  if ( !(this instanceof jQuery.Event) ) {
    return new jQuery.Event( src, props );
  }

  // Event object
  if ( src && src.type ) {
    this.originalEvent = src;
    this.type = src.type;

    // Events bubbling up the document may have been marked as prevented
    // by a handler lower down the tree; reflect the correct value.
    this.isDefaultPrevented = ( src.defaultPrevented ||
      src.getPreventDefault && src.getPreventDefault() ) ? returnTrue : returnFalse;

  // Event type
  } else {
    this.type = src;
  }

  // Put explicitly provided properties onto the event object
  if ( props ) {
    jQuery.extend( this, props );
  }

  // Create a timestamp if incoming event doesn't have one
  this.timeStamp = src && src.timeStamp || jQuery.now();

  // Mark it as fixed
  this[ jQuery.expando ] = true;
};

// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
jQuery.Event.prototype = {
  isDefaultPrevented: returnFalse,
  isPropagationStopped: returnFalse,
  isImmediatePropagationStopped: returnFalse,

  preventDefault: function() {
    var e = this.originalEvent;

    this.isDefaultPrevented = returnTrue;

    if ( e && e.preventDefault ) {
      e.preventDefault();
    }
  },
  stopPropagation: function() {
    var e = this.originalEvent;

    this.isPropagationStopped = returnTrue;

    if ( e && e.stopPropagation ) {
      e.stopPropagation();
    }
  },
  stopImmediatePropagation: function() {
    this.isImmediatePropagationStopped = returnTrue;
    this.stopPropagation();
  }
};

// Create mouseenter/leave events using mouseover/out and event-time checks
// Support: Chrome 15+
jQuery.each({
  mouseenter: "mouseover",
  mouseleave: "mouseout"
}, function( orig, fix ) {
  jQuery.event.special[ orig ] = {
    delegateType: fix,
    bindType: fix,

    handle: function( event ) {
      var ret,
        target = this,
        related = event.relatedTarget,
        handleObj = event.handleObj;

      // For mousenter/leave call the handler if related is outside the target.
      // NB: No relatedTarget if the mouse left/entered the browser window
      if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
        event.type = handleObj.origType;
        ret = handleObj.handler.apply( this, arguments );
        event.type = fix;
      }
      return ret;
    }
  };
});

// Create "bubbling" focus and blur events
// Support: Firefox 10+
if ( !jQuery.support.focusinBubbles ) {
  jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

    // Attach a single capturing handler while someone wants focusin/focusout
    var attaches = 0,
      handler = function( event ) {
        jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
      };

    jQuery.event.special[ fix ] = {
      setup: function() {
        if ( attaches++ === 0 ) {
          document.addEventListener( orig, handler, true );
        }
      },
      teardown: function() {
        if ( --attaches === 0 ) {
          document.removeEventListener( orig, handler, true );
        }
      }
    };
  });
}

jQuery.fn.extend({

  on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
    var origFn, type;

    // Types can be a map of types/handlers
    if ( typeof types === "object" ) {
      // ( types-Object, selector, data )
      if ( typeof selector !== "string" ) {
        // ( types-Object, data )
        data = data || selector;
        selector = undefined;
      }
      for ( type in types ) {
        this.on( type, selector, data, types[ type ], one );
      }
      return this;
    }

    if ( data == null && fn == null ) {
      // ( types, fn )
      fn = selector;
      data = selector = undefined;
    } else if ( fn == null ) {
      if ( typeof selector === "string" ) {
        // ( types, selector, fn )
        fn = data;
        data = undefined;
      } else {
        // ( types, data, fn )
        fn = data;
        data = selector;
        selector = undefined;
      }
    }
    if ( fn === false ) {
      fn = returnFalse;
    } else if ( !fn ) {
      return this;
    }

    if ( one === 1 ) {
      origFn = fn;
      fn = function( event ) {
        // Can use an empty set, since event contains the info
        jQuery().off( event );
        return origFn.apply( this, arguments );
      };
      // Use same guid so caller can remove using origFn
      fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
    }
    return this.each( function() {
      jQuery.event.add( this, types, fn, data, selector );
    });
  },
  one: function( types, selector, data, fn ) {
    return this.on( types, selector, data, fn, 1 );
  },
  off: function( types, selector, fn ) {
    var handleObj, type;
    if ( types && types.preventDefault && types.handleObj ) {
      // ( event )  dispatched jQuery.Event
      handleObj = types.handleObj;
      jQuery( types.delegateTarget ).off(
        handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
        handleObj.selector,
        handleObj.handler
      );
      return this;
    }
    if ( typeof types === "object" ) {
      // ( types-object [, selector] )
      for ( type in types ) {
        this.off( type, selector, types[ type ] );
      }
      return this;
    }
    if ( selector === false || typeof selector === "function" ) {
      // ( types [, fn] )
      fn = selector;
      selector = undefined;
    }
    if ( fn === false ) {
      fn = returnFalse;
    }
    return this.each(function() {
      jQuery.event.remove( this, types, fn, selector );
    });
  },

  bind: function( types, data, fn ) {
    return this.on( types, null, data, fn );
  },
  unbind: function( types, fn ) {
    return this.off( types, null, fn );
  },

  delegate: function( selector, types, data, fn ) {
    return this.on( types, selector, data, fn );
  },
  undelegate: function( selector, types, fn ) {
    // ( namespace ) or ( selector, types [, fn] )
    return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
  },

  trigger: function( type, data ) {
    return this.each(function() {
      jQuery.event.trigger( type, data, this );
    });
  },
  triggerHandler: function( type, data ) {
    var elem = this[0];
    if ( elem ) {
      return jQuery.event.trigger( type, data, elem, true );
    }
  },

  hover: function( fnOver, fnOut ) {
    return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
  }
});

jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
  "mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
  "change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {

  // Handle event binding
  jQuery.fn[ name ] = function( data, fn ) {
    return arguments.length > 0 ?
      this.on( name, null, data, fn ) :
      this.trigger( name );
  };

  if ( rkeyEvent.test( name ) ) {
    jQuery.event.fixHooks[ name ] = jQuery.event.keyHooks;
  }

  if ( rmouseEvent.test( name ) ) {
    jQuery.event.fixHooks[ name ] = jQuery.event.mouseHooks;
  }
});
})();