Hi Mary,

Try adding this to the Javascript on your Form:

function readInput(input) {
  var i = 0;
  $(".checkboxes input").each(function(){
    if ($(this).prop("checked")) {
      i++;
    }
  });
  if (i > 2) {
    alert("You may only pick 2 options");
    $("#"+input.data.id).prop("checked", false);
  }
}

$(document).ready(function(){
  $(".checkboxes input").each(function(){
    $(this).on("click", {id:$(this).attr("id")}, readInput);
  });
});

Also for this to work you'll need to add a class called "checkboxes" to the checkboxes you need to validate on your form.

I hope this helps!

Cheers, Dan