function getXMLHttpRequestObject()
{
  try{
    return new XMLHttpRequest();
  }
  catch(e){
    try{
      return new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch(e){
      return false;
    }
  }
}


function sprawdzDane(div, url, name, POST)
{
	var div+'Msg' = document.getElementById(div);
	var XMLHttpRequestObject = getXMLHttpRequestObject();

	if(XMLHttpRequestObject)
	{
		XMLHttpRequestObject.open("POST", url+'ajax/'+name);
		XMLHttpRequestObject.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		
		XMLHttpRequestObject.onreadystatechange = function()
		{
			if (XMLHttpRequestObject.readyState == 4)
			{
				if (XMLHttpRequestObject.status == 200) 
				{
					div.innerHTML = XMLHttpRequestObject.responseText;
					delete XMLHttpRequestObject;
					XMLHttpRequestObject = false;
				}
			}
		}
		
		XMLHttpRequestObject.send(POST);
	}
}