have I got a virus - safari keeps opening questionnaire website

hello folks,

Im getting concerned as often when I am using safari and clicking on a link a new tab opens asking me to do a questionnaire.

This page always says "consumer survery group" but has info about the website I was on before and asks questions so I can win stuff. The website listed at the top is "consumersurverygroup.org" but the website shown in the history tab is "http://www.lnksr.com" .

It is happening lots and Im concerned it might be a virus - especially because Im always telling ym friends how apple is better because ou dont need to worry about virus guard!!!

Even if its not a virus - how do i get rid of it??

please help

thanks

ALi