August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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window.onUnLoad
Nav2+, IE3+, Opera3+ Syntax
onUnLoad="command"
Description
The onUnLoad event handler of a property of a Window object is fired when the page is unloaded in that particular window instance. This occurs when the user leaves the page for another page.
Note
The onUnLoad event handler in the <body> of a document that is loaded in a frame will fire before an event handler loaded in the <frameset> tag that loaded the document.
Example
Listing 7.562 pops up an alert box when the user leaves the page.
Listing 7.562 Example of Using the onUnLoad Event
<body onUnLoad='alert("Please do not leave!")'>
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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