Radio button triggered actions in submit form

Question

I've customized my form, it's a regular order form that has 2 payment options right before the buy now button. I need to have the data going to autoresponder regardless of the payment option chosen...when they choose option 1 (cash), the form will redirect them to the thankyou page...but now that I have 2 radio buttons, how do I separate these events? How do I make them see the thankyou page if they choose option 1 - and redirect them to paypal if they choose the option 2?

<div class="gt-box">
  <div class="gt-labelpos">
    <label class="gt-label" id="500">How You Pay Mister?</label>
  </div>

  <div class="gt-inputpos">
    <div class="clrB">
      <input name="custom_payme" type="radio" class="gt-req gt-valid__required"
        checked="checked" value="cash"></input>
      <span class="gt-text">Ca$h</span>
    </div>
    <div class="clrB">
      <input name="custom_payme" type="radio" class="gt-req gt-valid__required"
        value="PayPal"></input>
      <span class="gt-text">PayPal</span>
    </div>
  </div>
  <em class="clearfix clearer"></em>
</div>

Answer 1

On you server side when you receive your form's data, you can check the value of the radio button and according to that redirect respectively.

Answer 2

Another approach which will help you prevent redirects is on submit button click to evaluate your radio value and redirect from there. You Javascript code would look something like this

$('.submit-btn').click = function(e) {
  e.preventDefault();
  if ($('.custom_payme').val() === 'cash') {
    $.post("Your post url for cash", form_data);
  }
  else {
    $.post("Your post url for Paypal", form_data);
  };
};