There are several way to resolve AJAX Cache Issue:

1. In server side, we can add this one:  
header("Cache-Control: no-cache, must-revalidate");

2. When sending AJAX request, we can add:
anyAjaxObj.setRequestHeader("If-Modified-Since","0");

3. When sending AJAX request, we can add:
anyAjaxObj.setRequestHeader("Cache-Control","no-cache");

4. Add new parameter after URL, for example: 
"?fresh=" + Math.random(); 
or "?timestamp=" + new Date().getTime();

5. Use "post" instead of "get". It is not recommended.


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For jquery:

$.ajax(
cache: false,
url: 'http://myurl',
data: {}
);

This will work for this particular request. If you want to expand the scope of this setting to all AJAX requests, you can set it on the global AJAX configuration:

$.ajaxSetup({ cache: false });