// JavaScript Document
var myRequest = null;

function CreateXmlHttpReq(handler) {
  var xmlhttp = null;
  xmlhttp = new XMLHttpRequest();
  xmlhttp.onreadystatechange = handler;
  return xmlhttp;
}

function myHandler() {
    if (myRequest.readyState == 4 && myRequest.status == 200) {
      var e = document.getElementById("take");
       e.innerHTML = (myRequest.responseText);
    }
}



function sndUserCheck(action)

{
  myRequest = CreateXmlHttpReq(myHandler);
    myRequest.open("GET","bin/verifica_matricola.php?nome=" +document.getElementById("nome").value+ 
                                      "&cognome=" +document.getElementById("cognome").value+
                                      "&matricola=" +document.getElementById("matricola").value  );
    myRequest.send(null);  

}