|
|
|
AvailabilityJavaScript 1.1 Synopsis<body onfocus="handler" ... > <frameset onfocus="handler" ... > window.onfocus DescriptionThe onfocus property of a Window specifies an event handler function that is invoked when the window is given keyboard focus. The initial value of this property is a function that contains the semicolon-separated JavaScript statements specified by the onfocus attribute of the <body> or <frameset> tags. In the Netscape 4 event model, the onfocus handler function is passed an Event object as an argument. In the IE event model, no argument is passed, but the applicable Event object is available as the event property of the Window object that contains the element. UsageIf your web page has animation, you can use the onfocus event handler to start the animation and the onblur handler to stop it, so it runs only when the user is paying attention to the window. See AlsoWindow.blur( ), Window.focus( ), Window.onblur; Chapter 19; Event, EventListener, and EventTarget in the DOM reference section |
|
|
|