title: Google Analytics Event Unique Per Session
body: <p>I have a site where I track click outs, one user may click out several times so if I have 100 users I may have 300 click out events. This is ok for a rough guide but ideally I would like to know how many users have clicked out so 100 users 85 users clicked out.</p>
  
  <p>I could write some js on my site to handle this store in a cookie but I was wondering if there is anything in ga.js that will allow me to fire an event once per session.</p>