Reload datatable with new aoData

Hey All,

I am using DataTables 1.9 and have a need to refresh my table with new aoData value on changing an option selector. The reloadTable() function shown below is placed outside the document.ready function.

1. When I use oTable.fnDraw(), the request is sent twice to the server, with aoData value of monitorAlertList & researchAlertList() in the example beow.
2. When I use oTable.fnReloadAjax() in the same line, it throws an error that it is not a function.

Please review and advise on both approaches. Thanks in advance!

var iCount;
var viewList= "monitorAlertList";

oTable = $('#alertTable').dataTable( {
		"sScrollY": "300",
		"oScroller": {
			"loadingIndicator": true
		},
		"sAjaxSource": "/grip/mobile/mobile",
		"bServerSide": true,
		"bDeferRender": true,
		"fnServerParams": function ( aoData ) {
		        aoData.push( { "name": "requestType", "value": viewList } );	
		        
			},
		"sDom": "RfrtS",
		"bSearchable": true,
		"bSort": true,
        "bFilter": true,
		"sServerMethod": "GET",
		"bStandingRedraw" : true,
		"aaSorting": [[0,'desc']],
		"aoColumnDefs": [
							{ "sTitle": "Time UTC", "aTargets": [ 0 ], "sName": "time", "mData": "time" , "bVisible": true},
							{ "sTitle": "Type", "aTargets": [ 1 ],"sName": "type", "mData": "type" , "bVisible": true},
							{ "sTitle": "Severity", "aTargets": [ 2 ], "sName": "severity", "mData": "severity" , "bVisible": true},
							{ "sTitle": "Subject", "aTargets": [ 3 ], "sName": "subject", "mData": "subject" , "bVisible": true},
							{ "sTitle": "User Name", "aTargets": [ 4 ], "sName": "userName", "mData": "userName" , "bVisible": true},
							{ "sTitle": "Description", "aTargets": [ 5 ], "sName": "message", "mData": "message" , "bVisible": false}
						],
		 "fnDrawCallback": function ( oSettings ) {
			iCount = oSettings.fnRecordsTotal();
			$("#iTotal").html(iCount);
		}
	}			
	);

function reloadAlertTable()
	{
		var selectedView = $("#alertViewsList option:selected").val();
		if (selectedView == 0)
		{
			viewList= "monitorAlertList";
			oTable.fnSetColumnVis( 5, false );
		}
		else if (selectedView == 1)
		{
			viewList= "researchAlertList";
			oTable.fnSetColumnVis( 5, true );
		}
		oTable.fnDraw(false);
	}