javascript_global_cookie.html

<script type="text/javascript">
  var cookieName = 'customer_type';
  var cookieValue = '{{get_var.t}}';
  var myDate = new Date();
  myDate.setMonth(myDate.getMonth() + 12);
  document.cookie = cookieName +"=" + cookieValue + ";expires=" + myDate 
                  + ";domain=.example.com;path=/";
</script>