open affiliate links in a new Browser

We have a small site that will be a template for our agents/ outworkers websites. At the moment all the Affiliate links open up in the original browser window, we want all the affiliate links to open in a new browser window. This work is quite urgent so any sensible bid will be accepted if the coder can complete the work within 36 hours of acceptance (12 links in total to be changed. we are able to duplicate the code for the other pages).