Add additional filters in modal popup

Hello all. I’m new to the framework. I have a page that has 5 textboxes and 5 search buttons to allow the user to perform a search. I wanted to know how I could allow the user to click on an “Additional Filters” button which would display a popup to allow the user to enter/select additional search filter options and return the data to the partent form. As I stated, the search form has 5 input textboxes and 5 buttons, corresponding to 5 “actions” in the controller. How can I accomplish this? Does anyone have a link to an examples?