jQuery Grid Plugin - jqGrid

$(document).ready(function() {

$("#find").button({ disabled: false }).click(function() {
jQuery.ajaxSettings.traditional = true;

var compId = $("#Competitions").val();
var roundId = $("#Rounds").val();

$("#ProgressBar").progressbar({ value: false }).show();

var _url = '@Url.Action("GetDataForGrid", "Results")' + '?competitionId=' + compId + '&roundId=' + roundId;

$.ajax(
{
type: "POST",
url: _url,
data: "",
dataType: "json",
success: function (result) {
$("#ProgressBar").hide();

var colD = result.colData;
var colN = result.colNames;
var colM = result.colModel;

jQuery("#Results").jqGrid({
jsonReader: {
root: "rows",
page: "page",
total: "total",
records: "records",
cell: "cell"
},
url: _url,
datatype: 'jsonstring',
mtype: 'POST',
datastr: colD,
colNames: colN,
colModel: colM,
pager: jQuery('#pager'),
rowNum: 100,
rowList: [100, 1000],
viewrecords: true,
shrinkToFit: false,
autowidth: true,
});

// TWO FIRST COLUMNS ARE FROZEN (frozen:true)
jQuery("#Results").jqGrid('setFrozenColumns');
},
error: function (x, e) {
alert(x.readyState + " " + x.status + " " + e.msg);
}
});
setTimeout(function() {
$("#Results").jqGrid('setGridParam', { datatype: 'json' });
}, 50);

});