//  File cookie_lib.js
//  -------------------------------
//  Some usefull Cookie - functions
//  Found on http://www.webreference.com/js/column8/functions.html
//  Slightly modified by JFA/FHSO
//  -------------------------------

// fix the bug in Navigator 2.0, Macintosh
// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"

function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0) {
    date.setTime(date.getTime() - skew); 
  }
  return date;
}

//  Some handy "constants" for cookie lifetime...
var CookieTimeNow       = fixDate(new Date());
var CookieExpiresInOneMinute= fixDate(new Date()); CookieExpiresInOneMinute.setTime(CookieTimeNow.getTime() + 1   * 1  * 1  * 60 * 1000);;
var CookieExpiresInOneHour  = fixDate(new Date()); CookieExpiresInOneHour.setTime(CookieTimeNow.getTime() + 1   * 1  * 60 * 60 * 1000);;
var CookieExpiresInOneDay   = fixDate(new Date()); CookieExpiresInOneDay.setTime(CookieTimeNow.getTime() + 1   * 24 * 60 * 60 * 1000);;
var CookieExpiresInOneMonth = fixDate(new Date()); CookieExpiresInOneMonth.setTime(CookieTimeNow.getTime() + 30  * 24 * 60 * 60 * 1000);;
var CookieExpiresInOneYear  = fixDate(new Date()); CookieExpiresInOneYear.setTime(CookieTimeNow.getTime() + 365 * 24 * 60 * 60 * 1000);;
//  ------------------------------


// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie; //alert("Cookie set: " + curCookie);
}

// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
  var dc = document.cookie; //alert("allcookies: " + dc);
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
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";
  }
}