window.onFocus
JavaScript1.0+, JScript1.0+ Nav2+, IE3+, Opera3+ Syntax
onFocus="command"
Description
The onFocus event handler of a property of a Window object is fired when the focus is placed on that particular window instance. Care should be taken when using this event handler, because it is possible to get into an infinite loop when using onBlur event handler or blur() method. Note that when this event handler is called within the <body> tag, it is overridden if a <frame> tag that also uses this event handler loaded the document.
Note
Some Navigator 3 browsers do not fully support this event handler when called in a <frameset> tag.
Example
Listing 7.558 has a frame set with two frames. The first frame, toc, has the onFocus event ...
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