Checkboxes allow the user to choose more than one option. The form's design and targeted use influence how you construct the checkbox. You can even have it appeared prechecked as in the second checkbox.

<form method="post" action="http://wwwebworks.biz/bit112/showFormData.php" name="initial">

<label><input type="checkbox" name="topping1" value="cheese" />Cheese</label>

<label><input type="checkbox" name="topping2" value="mushrooms" checked/>Mushrooms</label>

<label><input type="checkbox" name="topping3" value="olives"/>Olives</label>

</form>

Application: Add a set of at least 3 checkboxes to my_form.html. Make one prechecked.
Example: Form with a variety of 'checkbox' fields.