CheckBox with Value and Drop down menu

I am a newbie in Ruby. I would to ask from all the experts in Ruby on how to create a checkbox with value as well as a dropdown menu. I want it like this site Celiac Disease and Gluten-Free Diet Support. Their search form is good and I want to learn every aspect in doing it. Hope you can give me a step-by-step tutorial in doing it.

Thanks in advance.

checkbox →

selectbox →


I hope the above link is okay for you…

by bdeveloper01