JavaScript DHTML/Event onMethod/onReset
"onReset" Example
<html>
<body>
<p>Input some text below and click the reset button.</p>
<form name="form1"
method="post"
action="" onreset="alert("The form is being reset")">
<input type="text" value="">
<input type="reset" value="Reset">
</form>
</body>
</html>