Email Form Help

I was wondering if anyone could help me out with an email form. I want it to be exactly like the one on armorgames.com. Link here: http://armorgames.com/contact

Here is the code, I know very little ajax/php and I dont know how to make this form send to a certain email.

<p style="font-size:1.2em;"><strong>If you need help, make sure to <a href="#" title="FlashOverlord Help">check our FAQ</a> before sending your message.</strong></p>

												<form action="/contact" method="post" id="contactform">
					<input type="hidden" name="act" value="send" />
					<fieldset>
						<ol>
							<li class="alt">
								<label>Your Name:</label>
								<input type="text" name="yourname" value="" class="" maxlength="100" />
							</li>

							<li>
								<label>Your Email:  </label>
								<input type="text" name="youremail" value="" />
							</li>
							<li class="alt">
								<label>Subject:</label>
								<select name="subject">
									<option value="Help">Help</option>

									<option value="Feedback">Feedback</option>
									<option value="Business Offer">Business Offer</option>
									<option value="Press Inquiries">Press Inquiries</option>
									<option value="Infringement">Infringement</option>
									<option value="License Games">License Games</option>
									<option value="Other">Other</option>

								</select>
							</li>
							<li>
								<label>Message:</label>
								<textarea name="message" rows="8" cols="40"></textarea>
					      </li>
						</ol>
					</fieldset>

					<p><input type="submit" value="&nbsp;Send Your Message &rarr;&nbsp;" /></p>
				</form>
			</div>


</body>
</html>

Code (markup):

 

Probably something along these lines

mail("your@mail.com, $_POST["subject"], $_POST["yourname"]." [".$_POST["youremail"]."] has sent you an email!\n".$_POST["message"]);

PHP:

http://php.net/manual/en/function.mail.php
http://www.w3schools.com/PHP/php_mail.asp

 

where is js and .php file?