Legacy Event Properties

This section describes properties associated with legacy events supported by earlier versions of Windows Internet Explorer. For best results, we recommend designing webpages that rely on web standards. For more info, see Events.

In this section

Topic	Description
altKey	Retrieves a value that indicates the state of the ALT key. For the standards based property, see altKey.
altLeft	Retrieves a value that indicates the state of the left ALT key.
button	Sets or retrieves the mouse button pressed by the user. This property is not supported for Windows Store apps using JavaScript. For the standards based property that can be used with Windows Store apps using JavaScript , see button.
clientX	Sets or retrieves the x-coordinate of the mouse pointer, or user's finger, position relative to the client area of the window, excluding window decorations and scroll bars. For the standards based property, see clientX.
clientY	Sets or retrieves the y-coordinate of the mouse pointer, or user's finger, position relative to the client area of the window, excluding window decorations and scroll bars.
ctrlKey	Sets or retrieves the state of the CTRL key. For the standards based property, see ctrlKey.
ctrlLeft	Sets or retrieves the state of the left CTRL key.
data	Sets or retrieves the body of the onmessage request.
fromElement	Sets or retrieves the object from which activation or the mouse pointer is exiting during the event.
keyCode	Sets or retrieves the Unicode key code associated with the key that caused the event.
nextPage	Retrieves the position of the next page within a print template.
offsetX	Sets or retrieves the x-coordinate of a pointer's position relative to the object firing the event.
offsetY	Sets or retrieves the y-coordinate of a pointer's position relative to the object firing the event.
origin	Sets or retrieves the scheme, hostname, and port of the document that fired the onmessage event.
propertyName	Sets or retrieves the name of the property that changes on the object.
reason	Sets or retrieves the result of the data transfer for a data source object.
repeat	Retrieves whether the onkeydown event is being repeated. For the standards based property, see repeat.
returnValue	Sets or retrieves the return value from the event.
screenX	Sets or retrieves the x-coordinate of the mouse pointer's position relative to the user's screen. For the standards based property, see screenX.
screenY	Sets or retrieves the y-coordinate of the mouse pointer's position relative to the user's screen. For the standards based property, see screenY.
shiftKey	Retrieves the state of the SHIFT key. For the standards based property, see shiftKey.
shiftLeft	Retrieves the state of the left SHIFT key.
source	Retrieves the source window object of the onmessage event.
srcElement	Sets or retrieves the object that fired the event.
srcFilter	Sets or retrieves the filter object that caused the onfilterchange event to fire.
srcUrn	Retrieves the Uniform Resource Name (URN) of the behavior that fired the event.
toElement	Sets or retrieves a reference to the object toward which the user is moving the mouse pointer or, for a touch device, a finger.
type	Sets or retrieves the event name from the event object.
url	Sets or retrieves the fully qualified URL of the document that fired the event.
wheelDelta	Retrieves the distance and direction the wheel button has rolled.
which	Gets which mouse button is pressed.
x	Sets or retrieves the x-coordinate (in pixels) of the mouse pointer, or user's finger, offset from the closest relatively positioned parent element of the element that fired the event.
y	Sets or retrieves the y-coordinate (in pixels) of the mouse pointer, or user's finger, offset from the closest relatively positioned parent element of the element that fired the event.