substring a path to return dir name

My javascript:
 var URLname2 = document.location.href.match(/.*\/(.*)$/)[0];

the variable "URLname2" generate this path below
"http://localhost:00000/BusinessRules/Rule/1"

what I want for the "var URLname2" is to pull just the word "Rule" from the whole path

I'm not sure how this is done, but I tried Substring and didn't work. 

Thank you so much for your help, 
Lulu50