var datesRequest = createRequest();
//var eventsRequest = createRequest();

function createRequest()
{
  if(window.XMLHttpRequest)
  {
    return new XMLHttpRequest();
  }
  else
  {
  	return new ActiveXObject("Microsoft.XMLHttp");
  }
}

function createURL(url)
{
  return url + "?printable=1&t=" + (new Date()).getTime();
}

var prevI = 0;
var nextI = 0;

function incI()
{
  prevI++;
  nextI++;
}

function decI()
{
  prevI--;
  nextI--;
}

function getDatesContent(url, src)
{
  var content = document.getElementById("dates");
  datesRequest.open("GET", createURL(url), true);
  datesRequest.onreadystatechange = function()
  {
    if(datesRequest.readyState == 4)
    {
      if(datesRequest.status == 200)
      {
        content.innerHTML = datesRequest.responseText;
        if(src != "")
        {
          contentImg.innerHTML = '<img src="'+src+'" alt="">';
        }
      }
      else if(datesRequest.status == 404)
      {
        content.innerHTML = "<p>Ошибка 404</p>";
      }
    }
    else
    {
      content.innerHTML = "<p>Загрузка...</p>";
    }
  };
  datesRequest.send(null);
}