jQuery Grid Plugin - jqGrid

Thank you for a tool that will be really useful when I become more familiar with it.

I think i have a pathing problem and would appreciate some assistance.

My file updtstaff.php contains:
jQuery(document).ready(function(){
jQuery("#list2").jqGrid({
    // the url parameter tells from where to get the data from server
    // adding ?nd='+new Date().getTime() prevent IE caching
    url:'getstaff.php?nd='+new Date().getTime(),

getstaff.php gets the relevant records.

If I structure my directories as follows, the grid works complete with data

/site
    /admin
        updtstaff.php
        getstaff.php
        dbconfig.php
        jquery.jqGrid.js
        /js
        /images
        /themes

If I structure them as follows, I get the grid but no data in it.

/site
    /admin
        updtstaff.php
        getstaff.php
        dbconfig.php
    /includes
        /jqgrid
            jquery.jqGrid.js
            /js
            /images
            /themes

I suspect the problem to be with pathing pointing to getstaff.php as in
jQuery("#list2").jqGrid({
    // the url parameter tells from where to get the data from server
    // adding ?nd='+new Date().getTime() prevent IE caching
    url:'getstaff.php?nd='+new Date().getTime(),

but changing this to ../../admin/getstaff.php and other variations does not work.

Regards

Murray