A bit of a hack to track right-click/context menu link openings (i.e. right-click and select "Open in New Tab/Window")

right_click_link_tracking.js

$(function() {
  // A bit of a hack to track right-click and "Open in New Tab/Window clicks"
  $('#div_id a').bind("contextmenu",function(e){
    var d1 = new Date ();
    var d2 = new Date ( d1 ); 
    // Cookies will expire in 10 seconds, so basically the user has 10 seconds to right-click and open the link.
    d2.setSeconds ( d1.getSeconds() + 10 );   
    $.cookie('right_click_cookie', $(this).attr('href'), { 
      expires: d2,
      path: '/'
    });
  });

  right_click_cookie = $.cookie('right_click_cookie')
  // Does the value of the cookie equal the relative or absolute URL for the right-clicked link? If so, it's likely the user right-clicked the link and hit "Open in New Tab/Window"
  if (right_click_cookie != null && (window.location.pathname == right_click_cookie || window.location.href == right_click_cookie)) {
    // Clear the cookie so a refresh doesn't retrigger the event
    $.cookie('right_click_cookie', null, { path: '/' });    
    // Came up with this code to track ad clicks via Mixpanel, so log a Mixpanel event that serves as a normal ad-clicked event 
    mixpanel.track("Ad Click", {
      // Whatever Mixpanel properties you'd like to send!
    });
  }
});

You'll need this library to write/read the cookies: https://github.com/carhartl/jquery-cookie