convert json to csv file placed into Sdcard

We are developing Phonegap app.We need SqLite Db data placed into SDCard.We did sqLite Data convert into JSON String.now we send to SDCard.Using this link File API in PhoneGap

We code this json data placed into SDCard

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
    //alert("seeeeee1");
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
}
function gotFS(fileSystem) {
    alert("seeeeee2");
    fileSystem.root.getFile("forTEST.csv", {create: true, exclusive: false}, gotFileEntry, fail);
}
function gotFileEntry(fileEntry) {
    alert("seeeeee3");
    fileEntry.createWriter(gotFileWriter, fail);
}
function gotFileWriter(writer) {
    alert("set");
    writer.onwriteend = function(evt) {
    };
writer.write(JSONData);
}

But when we open it's CSV file in my mobile.it's JSON format

[
  {
    "items": "BODYLINESUPER",
    "descriptions": "100mg",
    "umo": "CTN",
    "qty": 7,
    "price": 1093.55,
    "lineamount": 7654.85,
    "customerid": "ARU007",
    "tdate": "2015-4-7",
    "orderId": "Himansu15",
  }
]

but We need Table format in CSV file.like

items         descriptions umo qty price  lineamount customerid tdate  orderId  
BODYLINESUPER  100mg       CTN  7  1093.55  7654.85   ARU007  2015-4-7 Himansu15   

this line Data send to CSV file

writer.write(JSONData);

Please guide me.