I'm new to this plugin, and I am trying to accomplish a specific task with it as fast as possible. The task is to have a modal window pop up anytime a user clicks any external link to leave the site. There are a few modals already built by other developers on the site that have content in them like ">>Leave Site? >>Return", and apparently they used to work but now are not. Can you give my any insight as to how content like the example I just gave works, if there are other similar calls like this, and just in general the best way to approach the task?