Optional popover for known keywords

[Henrik G.]

In addition to the previous requirements, something like the following is an often requested feature.

http://wwwlab.iki.his.se/~gush/lenatests/popuptest.html

A nice iframe popover to a site that contains a description of a concept.

If one clicks/doubleclicks etc on a marked keyword, we are shown a popup which shows an indepth description of the keyword
from a site like php.org w3schools pixar etc.

I suggest an optional url in the keword list for this. Not all keywords need explaining pages, but for the ones that do, this will be very useful.

If like the in the example above we highlight the word "perspective" the user can look in the iframe, or, by some means
(not implemented) like a floting button in the popup or some other means... the user can navigate to the site.

There are a few caveats when it comes to the navigational effects of the popover......

   # Can we opt out of popovers completely
   # How do we show the popover, on a computer
   # How do we show the popover, on a tablet
   # How do we show the popover, on a phone
   # How do we navigate away from the popover to the site e.g. pixar in this example... using a new page/tab ??
   # How can we make this feature non-annoying (not easy)
   # Certainly, hover can be used on computers, like a "better" alt tag, but what do we do on tabs/phones.... we cannot expect the user to keep his finger pressed on the keyword while reading.
  # How do we handle scrolling on the popover. We do not want the popover to close if we move mouse/finger/device to allow us to scroll in the popover window