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<HTML>
<HEAD>
<TITLE>onBeforeUnload Event Handler</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function verifyClose() {
event.returnValue = "We really like you and hope you will stay longer.";
}
window.onbeforeunload = verifyClose;
</SCRIPT>
</HEAD>
<BODY>
<H1>onBeforeUnload Event Handler</H1>
<HR>
<P>Use this button to navigate to the previous page:
<BUTTON ID="go" onClick="history.back()">
Go Back
</BUTTON>
</BODY>
</HTML>
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