Internet Explorer alternative for Mac?

[Tink10]

My workplace uses a company called Proxus for the payroll, and we can only use it in Internet Explorer. If I use Safari, Firefox, or Chrome, it does not even let me login. I know that IE was ditched years ago, but is there something just like it that i could install on my Mac? I tried using VirtualBox, but it didn't install correctly. I am running OSX Lion 10.7.5. It's not a huge deal, but it would be nice to be able to check my pay stubs from my Mac instead of having to take a screenshot of it at work, then emailing to myself to open at home.
Thank you everyone! I downloaded Google Chrome and installed the User Agent Switch extension. It works like a charm, and is perfect since i only need IE for this one website. : )