If you use asp.net RadioButtons you might have an issue when trying to find out which radio button is selected when it comes to jQuery. There are a lot of examples out there for people who use RadioButtonLists but for most people it might not be practical to display radio buttons like this.

If you use regular asp.net radio buttons then by using the following sample below you should see how to target the correct group of radio buttons and find out which has been selected.

HTML Code:

Javascript Code:

$("#PayNowButton").click(function (evt) {
        evt.preventDefault();
            var selectedPayment = $("#PaymentSection input[type='radio']:checked").val();
            alert('You selected: '+selectedPayment);
    });