📄 event_onunload.asp
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<h1>onunload Event</h1>
<hr />
<a href="dom_obj_event.asp"><img class="navup" src="../images/up.gif" alt="Event Object Reference" border="0" /> Complete Event Object Reference</a>
<hr />
<h2>Definition and Usage</h2>
<p>The onunload event occurs when a user exits a page.</p>
<h2>Syntax</h2>
<table class="ex" cellspacing="0" border="1" width="100%" id="table14">
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<td>
<pre>onunload="SomeJavaScriptCode"</pre>
</td>
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<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3" id="table15">
<tr>
<th align="left" valign="top" width="20%">Parameter</th>
<th align="left" valign="top" width="80%">Description</th>
</tr>
<tr>
<td valign="top">SomeJavaScriptCode</td>
<td valign="top">Required. Specifies a JavaScript to be executed when the
event occurs.</td>
</tr>
</table>
<p><b>Supported by the following HTML tags:</b></p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table16">
<tr>
<td>
<body>, <frameset></td>
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</table>
<p><b>Supported by the following JavaScript objects:</b></p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table17">
<tr>
<td>
window</td>
</tr>
</table>
<br />
<hr />
<h2>Example</h2>
<p>In this example an alert box will be displayed when the page is closed:</p>
<table class="ex" cellspacing="0" border="1" width="100%">
<tr>
<td>
<pre><body onunload="alert('The onunload event was triggered')">
</body></pre>
</td>
</tr>
</table>
<br />
<hr />
<h2>Try-It-Yourself Demos</h2>
<p><a target="_blank" href="../jsref/tryit.asp@filename=tryjsref_onunload">onunload</a><br />
How to use onunload.</p>
<hr />
<a href="dom_obj_event.asp"><img class="navup" src="../images/up.gif" alt="Event Object Reference" border="0" /> Complete Event Object Reference</a>
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