Flexigrid - Lightweight but rich data grid

[eluser]Unknown[/eluser]
Hey all I am New to flexigrid but so Far Loving it. however I am using the json data type and the only thing I cant seem to figure out is if I have an object selected in the grid how do I get the value of the selected column / row. below is my code and my json.

Code:

$("#flex2").flexigrid
                        (
                        {
                        url: '/utils/Renderxml/permsearch?
id=200&format=JSON&param=roles&searchparam;=',
                        dataType: 'json',
                        colModel : [
                                {display: 'ID', name : 'id', width:
40},
                                {display: 'User / Role ID', name :
'username', width: 80, sortable : false, align: 'left'}
                                ],
/*                      searchitems : [
                                {display: 'Username', name :
'username'},
{display: 'Assigned', name : 'assigned', isdefault: false}
                                ],
                        sortname: "username",
                        sortorder: "asc",*/
                        //usepager: false,
                        title: 'Results',
                        //useRp: false,
                        //rp: 15,
                        //showTableToggleBtn: false,
                        width: 'auto',
                        height: 'auto'
                        //colResize: false
                        }
                        );

Code:

$("#rolesearch").click(function(){
var visibleState = true;
$("#rolesearchdialog").css("visibility",(visibleState ? "visible" :
"hidden"));
$("#flex2").flexOptions({url:  '/utils/Renderxml/permsearch?
id=200&format=JSON&param=roles&searchparam;=' + document.getElementById
('role').value});
$("#flex2").flexReload();
$("#rolesearchdialog").dialog('open');

});

here is my json
----------------------------------------------------------------

Code:

{
page: 1,
total: 1,
rows: [
{id:'1007',cell:['1007','testrole']}]

}