I want to export the exist data into csv file. I try to use this code:

var uriContent = data:text/csv;charset=utf-8, + encodeURIComponent(data);

var myWindow = window.open(uriContent);

myWindow.focus();

it works but I can design filename. I can only get the dialog with name like MVeAnkW8.csv.part which I don't know where the name come from.

How can I assign filename in the first dialog? Thanks in advance.

update:

I am now using rails. Actually I have a method in server side names export_to_csv. In end of this method, I use code like that:

  send_data(csv_string,

  :type => 'text/csv; charset=utf-8;',

  :filename => myfile.csv)

It works and I can specify the file name.
For now, I want to use ajax to get more csv files(that is the reason why I want to use javascript, because a normal http request can only get one file to be downloaded).

I use js code like that:

$.post(export_to_csv,

 function(data) {

 var uriContent = data:text/csv;charset=utf-8, + encodeURIComponent(data);

     var myWindow = window.open(uriContent);

     myWindow.focus();});     

It get the data from server side and I try to transfer it into csv. I can get a file but can't specify the file name.