Testing multiple image clicks.
Version adds identification of the image by extracting the last ten characters from the full src.
In this version, there is a separate click score for each image
There are three separate functions, one for each image click.
Convert to String = http://www.w3schools.com/jsref/jsref_string.asp
Length = http://www.w3schools.com/jsref/jsref_length_string.asp
Slice = http://www.w3schools.com/jsref/jsref_slice_string.asp