I have the following code making a GET request on a URL:
$(\'#searchButton\').click(function() { $(\'#inquiry\').load(\'/portal/?f=searchBilling&pid=
For PHP, add this line to your script which serves the information you want:
header("cache-control: no-cache");
or, add a unique variable to the query string:
"/portal/?f=searchBilling&x=" + (new Date()).getTime()