I am in Sweden right now on a Schengen visa,Can I visit Switzerland on a Schengen visa?

Switzerland is not yet part of Schengen, you would need a Schengen visa that allowed multiple entries if you wanted to visit Switzerland.

But thanks to the open border agreement Switzerland has with Germany, going from the Schengen area to Switzerland is pretty easy. Just give the Swiss embassy in Sweden a call, if you hold a Schengen visa they will issue a Swiss visa without any problems.

Ciizens of the countries Bahrain - Kuwait - Oman - Qatar - Taiwan - Thailand - Saudi-Arabia - UAE can travel to Switzerland without a visa if they hold a multiple-entry Schengen visa.

http://www.bfm.admin.ch/

I would think so, I thought that once you were in europe there were no border controls between european countries anymore.