var request;
function getRequestObject()      {
       if ( window.ActiveXObject)  {
            return ( new ActiveXObject("Microsoft.XMLHTTP")) ;
        } else if (window.XMLHttpRequest)  {
           return (new XMLHttpRequest())  ;
        } else {
           return (null) ;
        }
  }
function sendRequest()      {
       request = getRequestObject() ;
       request.onreadystatechange = handleResponse ;
       request.open("GET", "http://mech.fis.agh.edu.pl/meteo/rest/json/all/s000/2020-07-10/2020-07-15", true);
       request.send(null);
  }
function handleResponse()      {
       if (request.readyState == 4)    {
          //alert(request.responseText);
          var jsonObj=eval(  "("  +  request.responseText    +  ")"    );
          //alert(jsonObj[0].data.p0);
          var txt = "<p>Licza przetworzonych wierszy: " + jsonObj.length.toString() + "</p>";
          txt += "<table class='data'><tr><th>Czas</th><th>Ciśnienie (hPa)</th></tr>"
          for (var i=0, max=jsonObj.length; i<max; i++) {
             txt += "<tr><td>" + jsonObj[i].time + "</td><td>" + jsonObj[i].data.p0 + "</td></tr>" ;
          }          
          txt += "</table>" ;
          document.getElementById('result').innerHTML = txt;
       }
}