var expDays = 7; 
var page = "http://www.politische-bildung-brandenburg.de/newsletterpopup.htm";
var windowprops = "width=370,height=230, left=400, top=310,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=no";

function GetCookie (name)
{
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
  var j = i + alen;
  if (document.cookie.substring(i, j) == arg)
    return getCookieVal (j);
  i = document.cookie.indexOf(" ", i) + 1;
  if (i == 0)
    break;
  }
return null;
}

function SetCookie (name, value)
{
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}

function DeleteCookie (name)
{
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name);
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

function amt(){
var count = GetCookie('count')
if(count == null) {
  SetCookie('count','1')
  return 1
} else {
  var newcount = parseInt(count) + 1;
  DeleteCookie('count')
  SetCookie('count',newcount,exp)
  return count
  }
}

function getCookieVal(offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

function checkCount() {
var count = GetCookie('count');
if (count == null) {
  count=1;
  SetCookie('count', count, exp);
  window.open(page, "", windowprops);
} else {
  count++;
  SetCookie('count', count, exp);
  }
}