Looking to get URL parameters out of Storyline

Good afternoon, 

I am currently using the Execute javascript triggers inside of storyline, and I am trying to capture the URL parameters of the current site.

Has anyone any idea of how to accomplish this?

ie.  If I am on http://www.google.com/cows?lmv=cownumber2500&stable=50

how would I get cownumber and stable information using storyline?

Thanks everyone!