var xmlhttp;

function showUser(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="addl2.php";
url=url+"?merk_id="+str;
url=url+"&sid="+Math.random();
clear("type");
clear("provider");
clear("prijzen");
if (str != ''){
xmlhttp.onreadystatechange=type;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}
}

function showProv(merk_id ,str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  } 
var url="addl2.php";
url=url+"?merk_id="+merk_id;
url=url+"&phonez_id="+str;
url=url+"&sid="+Math.random();
clear("prijzen");
clear("provider");
if (str != ''){
xmlhttp.onreadystatechange=provider;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}
}

function showPrijstabel(merk_id ,str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="prijstabel.php";
url=url+"?merk_id="+merk_id;
url=url+"&id="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=prijzen;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

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

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

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

function clear(blaat)
{
document.getElementById(blaat).innerHTML='';
}

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;
}