Fix markup validation warning

The hN a[id] was used in a previous implementation of the news entries
but is no longer useful

Also removed commented out javascript that is of no value
Move styling to css to fix markup validation error
These are now available on museum

Still keeping the last 5.4 and 5.3 release here..
The poor comment opacity level is now determined using a well-known, generic data normalization function. It's quite flexible and is hopefully easier to adjust for the future.