Choose a website from a dropdown menu and open it in a html frame in the same page

I’ve created a database with a few websites. Name of the website and specific link to page in 2 separated column.
Dropdown menu works great, i can choose from the website’s names (also introducing filters if necessary).
How can i show in a html frame below the related web page?

I would like also to introduce a couple of buttons that can move forward or back in the website list… and also a random button.
Do you think is something possible?

#dropdown #html #supernoob