Navigator 2.0, Internet Explorer 3.0
<BODY a definition of the handler [ onUnload="JavaScript statements" ] ... > <FRAMESET another way to define the handler [ onUnload="JavaScript statements" ] ... > window.onunload=handler-func defining the handler directly window.onunload(); an explicit invocation of the handler
onunload() is an event handler invoked by the browser when it unloads (i.e., leaves) a document or a frameset. The onunload() handler is defined by the onUnload attribute of the <BODY> or <FRAMESET> HTML tags. The value of this attribute may be any number of JavaScript statements, separated by semicolons.
The onunload() event handler provides the opportunity to perform any necessary "clean-up" of the browser state before a new document is loaded. For example, an onunload() handler might restore the Window.defaultStatus property (the default message in the status line) to the empty string.
When the browser leaves a site using frames, the onunload() handlers for each frame will be invoked before the onunload() handler of the browser itself.
The onunload() handler is invoked when the user has instructed the browser to leave the current page and move somewhere else. Therefore, it is almost never appropriate to delay the loading of the desired new page by popping up dialog boxes (with Window.confirm() or Window.prompt() for example) from an onunload() event handler.
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![]() o List host: MIT, Site host massmind.org, Top posters @none found - Page Editors: James Newton, David Cary, and YOU! * Roman Black of Black Robotics donates from sales of Linistep stepper controller kits. * Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters. * Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated! * Contributors: Richard Seriani, Sr. |
Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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