InstructorMixPanelInclude.js

//In the page Head:

<script type="text/javascript">
    (function(f,b){if(!b.__SV){var a,e,i,g;window.mixpanel=b;b._i=[];b.init=function(a,e,d){function f(b,h){var a=h.split(".");2==a.length&&(b=b[a[0]],h=a[1]);b[h]=function(){b.push([h].concat(Array.prototype.slice.call(arguments,0)))}}var c=b;"undefined"!==typeof d?c=b[d]=[]:d="mixpanel";c.people=c.people||[];c.toString=function(b){var a="mixpanel";"mixpanel"!==d&&(a+="."+d);b||(a+=" (stub)");return a};c.people.toString=function(){return c.toString(1)+".people (stub)"};i="disable track track_pageview track_links track_forms register register_once alias unregister identify name_tag set_config people.set people.set_once people.increment people.append people.track_charge people.clear_charges people.delete_user".split(" "); for(g=0;g<i.length;g++)f(c,i[g]);b._i.push([a,e,d])};b.__SV=1.2;a=f.createElement("script");a.type="text/javascript";a.async=!0;a.src="//cdn.mxpnl.com/libs/mixpanel-2-latest.min.js";e=f.getElementsByTagName("script")[0];e.parentNode.insertBefore(a,e)}}) (document,window.mixpanel||[]); mixpanel.init("e9f85a260e22673665c335ea07907e45");
    </script>

//In the page footer:

<script type='text/javascript'>
    if(typeof jQuery !== 'undefined' && typeof mixpanel !== 'undefined') {
      jQuery(function() {
        mixpanel.people.set_once("Landing Page", window.location.href);
        mixpanel.track("Landing Page", {    
            landing_page_url: window.location.href,
            marketing_channel: "social", // e.g. social, targeted blog, webinars, press, etc. (should be consistent naming)
            landing_page_variation: "(1) Signup Now Free" // Put varition note here, not necessary
        });
      });
    }
</script>