Test RESTful API through Firebug console (post queries)

firebug_post_queries.js

var http = new XMLHttpRequest();
http.open("POST", "http://gsb.rf/api2/sessions");
var params = "args=type:card,login:123,password:345";
http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.onreadystatechange = function() {
  if (http.readyState == 4 && http.status == 200) {
       console.info(http.responseText);
  }
};
http.send(params);