Hi,
I am trying to export resurls of my apex function into excel file using alasql library. But this functionality is quite unstable: sometimes it generates file for download, sometimes just overloads page.
This is my VF page:
 

<script>
function exportReport() {
             Visualforce.remoting.Manager.invokeAction(
                        '{!$RemoteAction.AdministrationController.getRemoteAreaData}', chartInterval,
                        function(result, event) {
                            alasql('SELECT * INTO XLS("CallsReport.xls",?) FROM ?', [chartData, result]);
                        });
            }
            //Column header title and field values bind with that header of report
            var chartData = {
                headers:true,
                columns: [
                    { columnid: 'name', title: 'Date'},
                    { columnid: 'incoming', title: 'Incoming'},
                    { columnid: 'outcoming', title: 'Outcoming'},
                ],
            };
</script>

<apex:commandButton value="Download Reports" onclick="exportReport();" style="margin-top:15px; width: 100%"/> 

Here what is happening in the controller:

@RemoteAction
    global static List<AreaDataWrapper> getRemoteAreaData(String interval) {
        return CallCenterAdministrationController.generateAreaData(interval);
    }

This function returns list of such objects:
 

global class AreaDataWrapper {

        public String name { get; set; }
        public Decimal incoming {
            get;
            set;
        }
        public Decimal outcoming {
            get;
            set;
        }

        public AreaDataWrapper(Decimal incoming, Decimal outcoming, String name) {

            this.name = name;
            this.incoming = incoming;
            this.outcoming = outcoming;
        }
    }

Thank you in advance