Use jQuery to send Excel data using AJAX

function SendToExcel() {
       $.ajax({
           type: "GET",
           url: "/Search.aspx",
           contentType: "application/vnd.ms-excel",
           dataType: "text",
           data: "{id: '" + "asdf" + "'}",
           success: function(data) {
              alert(data);
           },
           error: function (XMLHttpRequest, textStatus, errorThrown) {
              alert(XMLHttpRequest.responseText);
       }});
     }

function SendToExcel() {
        var dataString = 'type=excel' +
            '&Number=' + $('#txtNumber').val() +
            '&Reference=' + $('#txtReference').val()

        $("#sltCTPick option").each(function (i) {
             dataString = dataString + '&Columns=' + this.value;
        });

        top.iExcelHelper.location.href = "/Reports/JobSearchResults.aspx?" + dataString;;
     }

function exportExcel(){
    var inputs = $("#myForm").serialize();
    var url = '/ajaxresponse.php?select=exportExcel&'+inputs;
    location.href = url;
}

case 'exportExcel':{
                     ob_end_clean();
                     header("Content-type: application/vnd.ms-excel");
                     header("Content-Disposition: attachment;
                     filename=exportFile.xls");
                     echo $html->List($bd->ResultSet($_GET));
                }