How to send a http post (including cookie) in JavaScript. What's the syntax?

var post = '{"Data1": "value1","Data2":"'value2"}';

var packet = 'POST ' + '/news.html' + ' HTTP/1.0\n' +
 'Host: ' + 'www.site.ru'+ ':' + '80' + '\n'+
 'Connection: keep-alive\n'+
 'Content-Type: application/json\n'+
 'User-Agent: Mozilla/3.0 (compatible; Indy Library)\n'+
 'Accept-Encoding: identity\n'+
 'Content-Length: '+ post.length + '\n\n' + post + '\n' +
 'Cookie: income=1';

var Driver = IR.GetDevice("AV & Custom System TCP");

Driver.Send[packet];