When you hit "Submit" the form is sent to the server. The text sent looks something like this:
first=Philip&last=van+Allen&address=1234+A+Street&zip=90064&state=NY&income=1&band=Bjork&age=old&Hobbies1=blue&hobbies2=red&textfield=This+is+my+first+form.++Isn%27t+it+nice%3F&submit=Submit