<!-- _self is the default target -->
<form id="form-id" name="form-name" action="save_post.php" method="POST" target="_self">
worker name: <input type="text" name="wname" value="Javava"><br />
company name: <input type="text" name="cname" value="Disneyland"><br />
<button id="button-id" type="submit">Form Button</button>
</form>