naampagina = "filatelie";

var goodBrowser = false;
var appName = navigator.appName;
var appVersion = parseInt(navigator.appVersion);
if (appName == "Netscape")
  if (appVersion >= 3)
    goodBrowser = true;
if (appName == "Microsoft Internet Explorer")
  if (appVersion <= 2)
    appVersion = 3;
  else
    goodBrowser=true;
if (appVersion < 3)
{
  alert("Dit mailform gebruikt geadvanceerd JavaScript, hiervoor is minimaal een versie 3 browser nodig.");
  history.go(-1);
}

function splitStr(str, del)
{
  if (goodBrowser)
    return (str.split(del));
  else
  {
    var a = new Array();
    var i = 0;
    var j = 0;
    k = 0;
    while (i != -1)
    {
      j = str.indexOf(del, i);
      if (j != -1)
      {
        a[k] = str.substring(i, j);
        k++;
        i = j + del.length;
        if (i == str.length)
          i = -1;
      }
      else
      {
        a[k] = str.substring(i, str.length);
        i = -1;
      }
    }
    return (a);
  }
}

function mArr(n)
{
  this.count = n;
  return (this);
}

function parameter(name, value)
{
  this.name = name;
  this.value = value;
  return (this);
}

var queryString = location.search;
var parameters = new mArr(0);
if (queryString != "")
{
  queryString = queryString.substring(1, queryString.length);
  var pairs = splitStr(queryString, "&");
  for (var i = 0; i < pairs.length; i++)
  {
    temp = splitStr(pairs[i], "=");
    parameters.count++;
    parameters[i + 1] = new parameter(unescape(temp[0]), unescape(temp[1]));
    if (parameters[i + 1].name.toLowerCase() == "naampagina")
      if (parameters[i + 1].value != "")
        naampagina = parameters[i + 1].value;
    if (parameters[i + 1].name.toLowerCase() == "terug")
      if (parameters[i + 1].value != "")
        terug = parameters[i + 1].value;
  }
}