JavaScript: The Definitive Guide, Fourth Edition

Name

Event — details about an event

Availability

JavaScript 1.2; incompatible versions supported by Netscape 4 and IE 4

Synopsis

function handler(event) { ... } // Event handler argument in Netscape 4 
window.event   // Window property in IE 4

Constants

In Netscape 4, the Event object defines bitmask constants for each of the supported event types. These static properties are used to form the bitmasks that are passed to captureEvents( ) and releaseEvents( ). The available constants are:

Event.ABORT	Event.BLUR	Event.CHANGE	Event.CLICK
Event.DBLCLICK	Event.DRAGDROP	Event.ERROR	Event.FOCUS
Event.KEYDOWN	Event.KEYPRESS	Event.KEYUP	Event.LOAD
Event.MOUSEDOWN	Event.MOUSEMOVE	Event.MOUSEOUT	Event.MOUSEOVER
Event.MOUSEUP	Event.MOVE	Event.RESET	Event.RESIZE
Event.SELECT	Event.SUBMIT	Event.UNLOAD

Netscape 4 Properties

height

Set only in events of type “resize”. Specifies the new height of the window or frame that was resized.

layerX, layerY

Specify the X- and Y-coordinates, relative to the enclosing layer, at which an event occurred.

modifiers

Specifies which keyboard modifier keys were held down when the event occurred. This numeric value is a bitmask consisting of any of the constants Event.ALT_MASK, Event.CONTROL_MASK, Event.META_MASK, or Event.SHIFT_MASK. Due to a bug, this property is not defined in Netscape 6 or 6.1.

pageX, pageY

Specify the X- and Y-coordinates, relative to the web browser page, at which the event occurred. Note that these coordinates ...