var request;
function getRequestObject()      {
       if ( window.ActiveXObject)  {
            return ( new ActiveXObject("Microsoft.XMLHTTP")) ;
        } else if (window.XMLHttpRequest)  {
           return (new XMLHttpRequest())  ;
        } else {
           return (null) ;
        }
  }
function sendRequest(d1,d2)      {
       request = getRequestObject() ;
       request.onreadystatechange = handleResponse ;
       //alert ("/"+d1.value+"/"+d2.value);
       request.open("GET", "http://mech.fis.agh.edu.pl/meteo/rest/json/all/s000/"+d1.value+"/"+d2.value, true);
       request.send(null);
  }
function handleResponse() {
      myDiv = document.getElementById("myDiv");
      if (request.readyState == 1) {
           myDiv.innerHTML += "Pobieranie danych:" ;
      } 
      else if (request.readyState == 2) {
           myDiv.innerHTML += "." ;
      }
      else if (request.readyState == 3) {
           myDiv.innerHTML += "." ;
      }
       if (request.readyState == 4)    {
          //alert(request.responseText);
          jsonObj=eval(  "("  +  request.responseText    +  ")"    );
          //alert(jsonObj[0].data.pa);
          document.getElementById('sel').style.display = "block";
       }
}