var refresh_rate=5000;
var div_id='blockNewsRotator';

function init()
{
  setTimeout(nextNewsItem,refresh_rate);
}

function getField(fieldName){
  if(fieldName == "")
    return;

  var myTextField = document.getElementById(fieldName);

  if(!myTextField)
    return;
		
  if (myTextField.value != "")
    return myTextField.value
  else
    alert("Veld "+fieldName+"is leeg")		
}

function nextNewsItem()
{
  var catIDs=getField('catIDs')
  var newsID=getField('newsID')

  if (!catIDs || !newsID)
    return;
  if (catIDs == "" || newsID == "")
    return;

  var url="http://www.ltcvathorst.nl/uploads/skins/default-Vathorst/nextNewsItem.asp?catIDs=" + catIDs + "&newsID=" + newsID

  loadXMLDoc(url);
  init()
}

function loadXMLDoc(url)
{
  if (window.XMLHttpRequest)
  { // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
    xmlhttp.open("GET",url,false);
    xmlhttp.send(null);
  }
  else
  { // code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    xmlhttp.open("GET",url,false);
  
    // Do not send null for ActiveX
    xmlhttp.send();
  }
  document.getElementById(div_id).innerHTML=xmlhttp.responseText;
}

init();