1. Sample Page
Radio buttons are the ideal choice where you want your visitor to select one out of a number of different options but if you want to allow more than one option to be selected then you can't use radio buttons. If we just use checkboxes instead then our visitor will be able to select any number of options between zero and the total number of choices given. There is no button format that just allows two or three out of a larger number of options to be selected.
Please select up to 2 boxes and 3 hats.
The first step to add this functionality to your forms is to obtain the script.