var xmlhttp;

function ShowRecords(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
  //alert ("ajax.js");
var url="ajax.php";
url=url+"?clicked="+str;
url=url+"&vak_anw="+document.getElementById("vak_anw").checked;
url=url+"&vak_bio="+document.getElementById("vak_bio").checked;
url=url+"&vak_nat="+document.getElementById("vak_nat").checked;
url=url+"&vak_nlt="+document.getElementById("vak_nlt").checked;
url=url+"&vak_sch="+document.getElementById("vak_sch").checked;
url=url+"&vak_tnk="+document.getElementById("vak_tnk").checked;
url=url+"&vak_wis="+document.getElementById("vak_wis").checked;
url=url+"&klas_1h="+document.getElementById("klas_1h").checked;
url=url+"&klas_2h="+document.getElementById("klas_2h").checked;
url=url+"&klas_3h="+document.getElementById("klas_3h").checked;
url=url+"&klas_4h="+document.getElementById("klas_4h").checked;
url=url+"&klas_5h="+document.getElementById("klas_5h").checked;
url=url+"&klas_1v="+document.getElementById("klas_1v").checked;
url=url+"&klas_2v="+document.getElementById("klas_2v").checked;
url=url+"&klas_3v="+document.getElementById("klas_3v").checked;
url=url+"&klas_4v="+document.getElementById("klas_4v").checked;
url=url+"&klas_5v="+document.getElementById("klas_5v").checked;
url=url+"&klas_6v="+document.getElementById("klas_6v").checked;
url=url+"&stap_1="+document.getElementById("stap_1").checked;
url=url+"&stap_2="+document.getElementById("stap_2").checked;
url=url+"&stap_3="+document.getElementById("stap_3").checked;
url=url+"&stap_4="+document.getElementById("stap_4").checked;
url=url+"&stap_5="+document.getElementById("stap_5").checked;
url=url+"&stap_6="+document.getElementById("stap_6").checked;
url=url+"&categorie_1="+document.getElementById("categorie_1").checked;
url=url+"&categorie_2="+document.getElementById("categorie_2").checked;
url=url+"&categorie_3="+document.getElementById("categorie_3").checked;
url=url+"&filter1="+document.getElementById("filter1").checked;
url=url+"&filter2="+document.getElementById("filter2").checked;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()
{
if (xmlhttp.readyState==4)
{
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}