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Javascript onUnload Event Handler

Article by:  Jeff Anderson  ( 1362 ) (3/30/2002)
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Summary: The onUnload Event Handler allows you to perform an action as the user leaves the page.
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Javascript onUnload Event Handler


Live Demo

The onUnload Event Handler allows you to perform an action as the user leaves the page. Click here to see an example of an javascript alert that pops up when leave the page.

How did we do that? Simple : within the body tag of the loading page, put the following:

<BODY onUnload="alert('Are you sure
 you have spent long enough on this lovely page?')">


As usual, keep all the above on one line to ensure it works properly. Two things to watch out for here : remember that Javascript is case sensitive, and will not work if you use 'onunload' instead of 'onUnload'. Secondly, don't confuse your single and your double quotes!



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