Sorry let me be more clear:
There is some text along with the checkbox and submit button. When that submit button is clicked I only want the information that follows the submit button to be displayed, not the text when you first go to the page. For example:
Do you agree?
Yes [checkbox here]
[submit button]
// The submit button is clicked, now this is what is displayed:
Thank you for agreeing.
Does this make more sense? My apologies for the confusion.