The onLoad and onUnload Methods

This page displays a "hello" dialog when you load it, and a "goodbye" dialog when you unload it. Annoying, isn't it?

This is done through event handlers specified in this document's <BODY> tag. Aside from that tag, the rest of the document doesn't affect the dialogs.

Source

<HTML>
<HEAD><TITLE>onLoad and onUnload Example</TITLE>
</HEAD>
<BODY onLoad="window.alert('Hello, and welcome to this page.');"
onUnload="window.alert('You unloaded the page. Goodbye!');">
<H1>The onLoad and onUnload Methods</H1>
<HR>
This page displays a "hello" dialog when you load it, and a "goodbye"
dialog when you unload it. Annoying, isn't it?
<HR>
This is done through event handlers specified in this document's
<BODY> tag. Aside from that tag, the rest of the document doesn't
affect the dialogs.
<HR>
</BODY>
</HTML>