Prevent Ajax GET and HEAD calls from receiving cached results. This approach appends a timestamp to the query string to defeat web server caching. See http://api.jquery.com/jQuery.ajax and http://api.jquery.com/jQuery.ajaxSetup. Another approach is to amend server-side code to set an HTTP header such as Expires.

PreventAjaxCaching.js

// Disable caching globally, for all Ajax requests
$.ajaxSetup ({
  cache: false
});

// Make an Ajax request with caching explicitly disabled
$.ajax({
  type: "GET",
  cache: false,
  url: "http://example.com/GetSomeData"
});