The reset buttons are used for bigger forms usually, in case the user has mistyped the majority of the information introduced, therefore wanting to erase the entire introduced text.
html<input type="reset" value="Reset" /><br />
<input type="reset" value="Delete" /><br />
<input type="reset" value="Clear form " />
For the reset button to be functional will be needed to introduce it in the <form> tag. You can read the tutorial about HTML Forms for more examples.
html<form action="myphp.php" method="post">
<input type="text" size="15" maxlength="15" /><br />
<input type="text" size="25" maxlength="25" /><br />
<input type="reset" value="Delete" />
</form>
Try to insert a small text and click the "Delete" button in the example above.