function getXMLHttp(){
  var xmlHttp
  
  try{
    //Firefox, Opera 8.0+, Safari
    xmlHttp = new XMLHttpRequest();
  }
  catch(e){
    //Internet Explorer
    try
    {
      xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch(e)
    {
      try
      {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch(e)
      {
        alert("Your browser does not support AJAX!")
        return false;
      }
    }
  }
  return xmlHttp;
}

function show_brochureform(div,id){
  var xmlHttp = getXMLHttp();
  
  xmlHttp.onreadystatechange = function(){
    if(xmlHttp.readyState == 4)
    {
      HandleResponse(div, xmlHttp.responseText);
    }
  }
  xmlHttp.open("GET", "local/brochure_formulier.html", true); 
  xmlHttp.send(null);
}

function HandleResponse(div,response)
{
  document.getElementById(div).innerHTML = response;
}