Can Rhino Javascript execute an external program?

I am working with a project that has already been configured to use Rhino Javascript and not Groovy. I would like to use putty/plink to exercise a task in a remote machine as a test step. I found that this is possible using Groovy script, but through lots of searching, I was not able to find an example of how to do this in Javascript. (1) Does anyone know if this is possible using Javascript? Also (2) is it possible to have both Groovy and Javascript test steps in the same ReadyAPI project? Thanks in advance for any info.