Measuring Variational Distance

R-Users,
         Does anyone know if there is a package or code somewhere in R that 
provides a measure of the maximum difference between 2 distributions 
defined on a common space?  I think it is called variational distance?  I 
have constructed several marginal distribution plots (proportion/sample 
where I defined bin-widths) showing the difference between 2 treatments and 
I have been trying to get a measure of the difference in area between the 
curves.

I tried searches using "variational distance"  on the R website and CRAN 
with no luck.

TIA,

Bret Collier
Univ. Arkansas