function gethttp() {
  var http_request = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    http_request = new XMLHttpRequest();
  } else if (window.ActiveXObject) { // IE
    try {
      http_request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      try {
        http_request = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {}
    }
  }
  if (!http_request) {
    alert("Giving up :( Cannot create an XMLHTTP instance");
    return false;
  } else {
    return http_request;
  }
}

/*
function makeCalendarvl_test1_1Request() {
  var http_request=gethttp();
  http_request.onreadystatechange = function() { alertCalendarvl_test1_1(http_request,true); };
  http_request.open('GET', 'http://www.kvam.lt/modules/AjaxMadeSimple/requesthandler.php?module=Calendar&method=VLTest&p1=as1&p2=as2', true);
  http_request.send(null);
}

function alertCalendarvl_test1_1(http_request,refresh) {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      element=document.getElementById('vl_test_div');
      element.innerHTML=http_request.responseText;
      h = element.scrollHeight;
      element.scrollTop = h;
      if (refresh) window.setTimeout('makeCalendarvl_test1_1Request()',-1);
    } else {
      alert('There was a problem with the request.');
    };
  }
}
*/


var calendar_div = 'calendarDiv';
var events_div = 'eventsDiv';

function updateCalendarRequest(year, month, lang, returnid, detailpage2) {
  var http_request=gethttp();
  http_request.onreadystatechange = function() { doUpdateCalendar(http_request,false); };
  http_request.open('GET', 'http://www.kvam.lt/modules/AjaxMadeSimple/requesthandler.php?module=Calendar&method=GetCalendar&year='+year+'&month='+month+'&lang='+lang+'&returnid='+returnid+'&detailpage2='+detailpage2, true);
  http_request.send(null);
  return false;
}

function doUpdateCalendar(http_request,refresh) {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      element=document.getElementById(calendar_div);
      element.innerHTML=http_request.responseText;
      h = element.scrollHeight;
      element.scrollTop = h;
      if (refresh) window.setTimeout('updateCalendarRequest()',-1);
    } else {
      alert('There was a problem with the request.');
    };
  }
}


function getEventsForSelectedDayRequest(year, month, day) {
  var http_request=gethttp();
  http_request.onreadystatechange = function() { doGetEventsForSelectedDay(http_request,false); };
  http_request.open('GET', 'http://www.kvam.lt/modules/AjaxMadeSimple/requesthandler.php?module=Calendar&method=GetEventsForTheDay&year='+year+'&month='+month+'&day='+day, true);
  http_request.send(null);
  return false;
}

function doGetEventsForSelectedDay(http_request,refresh) {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      element=document.getElementById(events_div);
      element.innerHTML=http_request.responseText;
      h = element.scrollHeight;
      element.scrollTop = h;
      if (refresh) window.setTimeout('updateCalendarRequest()',-1);
    } else {
      alert('There was a problem with the request.');
    };
  }
}

function getEventsSearchRequest(search_text_id, returnid, detailpage2) {
  var elem = document.getElementById(search_text_id);
  if(!elem) return false;
  var search_text = elem.value;
  if(search_text.trim == ''){
	alert('Nenurodytas paieškos žodis');
	return false;
  }
  var http_request=gethttp();
  http_request.onreadystatechange = function() { doEventsSearch(http_request,false); };
  http_request.open('GET', 'http://www.kvam.lt/modules/AjaxMadeSimple/requesthandler.php?module=Calendar&method=doEventsSearchAjax&search_text='+search_text+'&returnid='+returnid+'&detailpage2='+detailpage2, true);
  http_request.send(null);
  return false;
}

function doEventsSearch(http_request,refresh) {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      element=document.getElementById(events_div);
      element.innerHTML=http_request.responseText;
      h = element.scrollHeight;
      element.scrollTop = h;
      if (refresh) window.setTimeout('updateCalendarRequest()',-1);
    } else {
      alert('There was a problem with the request.');
    };
  }
}


function getEventsFilterRequest(filter_form_id, returnid, detailpage2) {
  var elem = document.getElementById(filter_form_id);
  if(!elem) return false;  
  var kam = elem.kamSkirta.value;
  var kada = elem.laikoIntervalai.value;
  var metai = elem.metai.value;
  var menuo = elem.menuo.value;
  
  if(kam == 0 && kada == 0 && metai==0 && menuo == 0){
	alert('Nenurodyta filtravimo sąlyga');
	return false;
  }
  var http_request=gethttp();
  http_request.onreadystatechange = function() { doEventsFilter(http_request,false); };
  http_request.open('GET', 'http://www.kvam.lt/modules/AjaxMadeSimple/requesthandler.php?module=Calendar&method=doEventsFilterAjax&kamSkirta='+kam+'&laikoIntervalai='+kada+'&metai='+metai+'&menuo='+menuo+'&returnid='+returnid+'&detailpage2='+detailpage2, true);
  http_request.send(null);
  return false;
}

function doEventsFilter(http_request,refresh) {
  if (http_request.readyState == 4) {
    if (http_request.status == 200) {
      element=document.getElementById(events_div);
      element.innerHTML=http_request.responseText;
      h = element.scrollHeight;
      element.scrollTop = h;
      if (refresh) window.setTimeout('updateCalendarRequest()',-1);
    } else {
      alert('There was a problem with the request.');
    };
  }
}