仅在单击链接时加载iframe

How can I display one iframe at a time? So I have an index webpage that has links in the nav to the iframes but I want the iframes to only display when the links are clicked? Right now they are both displaying.Is this a javascript solution? I am new to coding so if so then it might just be easier for me to not use iframes and just set up different pages and target an id. How can I display one iframe at a time? So I ha