Sending info to website

Hello i was wondering if their is a way to send info to the web server. What im trying to do is have the pico somewhere else and be collecting the how bright the light is, but how to you send the info to the webpage.

I know how to get info from the webpage though this code

------------Code---------------
function pageHandler(req, res) {
  if (req.method=="POST") {
    // If it POST(Web side does this), save the data
    var info = url.parse(req.url,true);
    console.log("POST ",info);
    //Looks though HTML "pos" and collect the value
    if (info.query && "pos" in info.query)
      //Activats setPos
      setPos(parseFloat(info.query.pos));
    res.writeHead(200);
    res.end("Ok.");
  } else {
    // otherwise write the page out
    console.log("GET "+req.url);
    if (req.url=="/") {
      res.writeHead(200);
      res.end(page);
    } else {
      res.writeHead(404);
      res.end("404: Not found");
    }
  }
}
--------------------------------------end of code----------