I wanted to send a call using Ajax. When I do it in Chrome it is rising an error but in Firefox there is no error.  I tried to record my call in Firebug but there is no call request in Firebug.
Index.chshtml code is below:
function onLoad(e) {
    var grid = $(this).data("tGrid");
    //bind to the context menu of the Grid's header
    event.preventDefault();
    $(this).find(".t-grid-header").bind('contextmenu', function (e) {
        //wait for the menu to be generated
        setTimeout(function () {
            // bind to the checkboxes change event. The context menu has ID in the format "GridName" + "_contextmenu"
            $('#globalsearchgrid_contextMenu :checkbox').change(function () {
                debugger;
                var $checkbox = $(this);
                // the checked state will determine if the column has been shown or hidden
                var checked = $(this).is(":checked");
                // get the index and the corresponding column from the Grid's column collection
                var columnIndex = $(this).data("field");
                var request = "{'columnIndex':'" + columnIndex + "'value':'" + checked + "'}";
                $.ajax({
                    type: "POST",
                    url: "../../GlobalSearch/SaveColumnInfo",
                    data: request,
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (msg) { },
                    error: function (xhr, status, error) {
                        alert(error.responseTextss);
                    }
                });
            });
        });
    });
}
Controller method.
 public JsonResult SaveColumnInfo(string columnIndex, string value)
    {
        CookieHelper helper=new CookieHelper();
        helper.UpdateCookie(int.Parse(columnIndex), value.ToString());
        return Json("Success");
    }
Error in Chrome.
POST http://localhost:3577/GlobalSearch/SaveColumnInfo 500 (Internal Server Error)
jQuery.ajaxTransport.send
jQuery.extend.ajax
(anonymous function)
jQuery.event.handle
jQuery.event.add.elemData.handle.eventHandle
Can someone help me with this error?