/*algemeen cookies */

//  Function to return the value of the cookie specified by "name".
//  name - String object containing the cookie name.
//  returns - String object containing the cookie value, or null if cookie does not exist.
//
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 getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}


//--  Function to create or update a cookie.
// name - String object containing the cookie name.
// value - String object containing the cookie value.  May contain any valid string characters.
// [expires] - Date object containing the expiration data of the cookie. 
//      If omitted or null, expires the cookie at the end of the current session.
// [path] - String object indicating the path for which the cookie is valid.
//      If omitted or null, uses the path of the calling document.
// [domain] - String object indicating the domain for which the cookie is valid
//      If omitted or null, uses the domain of the calling document.
// [secure] - Boolean (true/false) value indicating whether cookie transmission requires a secure channel (HTTPS).  
//
// The first two parameters are required.  The others, if supplied, must
// be passed in the order listed above.  To omit an unused optional field,
// use null as a place holder: SetCookie ("myCookieName", "myCookieValue", null, "/");
//
function SetCookie(name,value,expires,path,domain,secure) {
  expires= new Date()
  y= expires.getTime()
  expires.setTime( y+ 9900000 )                     // STANDARD 3 HOURS FOR EXP
  document.cookie = name + "=" + escape (value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
}

//----- Function to delete a cookie. (Sets expiration date to start of epoch)
// name -   String object containing the cookie name
// path -   String object containing the path of the cookie to delete.  This MUST
//         be the same as the path used to create the cookie, or null/omitted if
//         no path was specified when creating the cookie.
// domain - String object containing the domain of the cookie to delete.  This MUST
//             be the same as the domain used to create the cookie, or null/omitted if
//             no domain was specified when creating the cookie.
//
function DeleteCookie(name,path,domain) {
  if (GetCookie(name)) {
    document.cookie = name + "=" +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}



//-- check wachtwoord voor toegang gemeente info
// haal eerst naam uit cookie op
// return 0 indien fout, 1 indien oke
function checkGem()
{
 SetCookie( "gemChk", "0")
  var nn= "0"
  pws= prompt( "Uitsluitend toegang met wachtwoord voor "+ GetCookie( "gemFileName"), "")
  if (pws== "ozorovo")
  {
    nn= "1"
    SetCookie( "gemChk", "1")
    gemChk= GetCookie( "gemChk") 
  }
return nn
}

//-- check wachtwoord voor toegang rovo info
// haal eerste naam uit cookie op
// return 0 indien fout, 1 indien oke
function checkRov()  {
  SetCookie( "rovoChk", "0")
  var nn= "0"
  pws= prompt( "Uitsluitend toegang met wachtwoord voor "+ GetCookie( "ovFileName"), "")
  if (pws== "ziezorovo")
  {
    nn= "1"
    SetCookie( "rovoChk", "1")
    rovoChk= GetCookie( "rovoChk") 
  }
return nn
}