Tracking visitor behavior

I have encountered a small issue with the solution to my related question.  When visitors to my website --  www.mauitradewinds.com -- click on the TripAdvisor menu button, the html code on page TripAdvisor.htm redirects them to an external site, but also allows me to track the page visit.  However, when the visitor's browser arrives at the external website, there is a Back button available.  Clicking that button reloads the same page, which could be irritating.  Is there a way to eliminate that active Back button?  I have tried using javascript, instead of plain html, to perform the redirection, with a function to auto-close the parent page, but there are other issues with that approach.  It doesn't work with most browsers, and may result in popup blocking.