I have managed to create this simple form, how do I parse info the user clicks on.

HTML Code:
<form id='sampleform' method='post' action='myurl.com' >
   <p>
   Name: <input type='text' name='Name' />
   </p>
   <p>
   Email: <input type='text' name='Email' />
   </p>
<input type="radio" name="subject" value="maths" /> &pound;10
<input type="radio" name="subject" value="physics" /> &pound;5
<input type="radio" name="subject" value="physics" /> &pound;3
&pound;<input type='text' name='donate-amount' />
   <p>
   <input type='submit' name='Submit' value='Submit' />
   </p>
</form>