The script does not work on real devices, but it works fine in emulator

var http = new XMLHttpRequest()
var url = "http://ubuntutouch.people8people.com:8080/news/app/searcNews.php";
var params = "searchNews=" +searchText;
http.open("POST", url, true);

 // Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() { // Call a function when the state changes.
            console.log(http.responseText)
}

http.send(params);

Do i have to setup on my ubuntu touch devices?

Thanks For your time