Using Sessvars (JavaScript session variables) to send data to your support center and store it within the browser session (so it's still accessible as the user browses your support center) without the use of cookies or multipass.

gistfile1.js

// Include the sessvars library
<script src="https://desk-customers.s3.amazonaws.com/shared/sessvars.js" type="text/javascript"></script>

// This function allows you to read a GET parameter from the URL
function getParameterByName(name) {
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
    results = regex.exec(location.search);
  return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

// This function populates the page with whatever the value of 'color' sessvar is
function popFromSess() {
  $(".color").html(sessvars.color);
  $(".animal").html(sessvars.animal);
}

// On page load, grab the GET parameter and store it as a sessvar, then populate the page with it
$(function() {
  if (getParameterByName("color")) { sessvars.color = getParameterByName("color");}
  if (getParameterByName("animal")) { sessvars.color = getParameterByName("cow");}
  popFromSess();
});