// Cookie API  v1.0.1

// documentation: http://www.dithered.com/javascript/cookies/index.html

// license: http://creativecommons.org/licenses/by/1.0/

// code (mostly) by Chris Nott (chris[at]dithered[dot]com)





// Helper functions for days -> date

function daysInFuture(days) {

  var date = new Date();

  date.setTime(date.getTime()+(days*24*60*60*1000));

  return date;

}





// Write a cookie value

function setCookie(name, value, expires, path, domain, secure) {

   path = "/";

   domain = ".ieee.org";

   var curCookie = name + '=' + escape(value) + ((expires) ? '; expires=' + expires.toGMTString() : '') + ((path) ? '; path=' + path : '') + ((domain) ? '; domain=' + domain : '') + ((secure) ? '; secure' : '');

   document.cookie = curCookie;

}





// Retrieve a named cookie value

function getCookie(name) {

   var dc = document.cookie;

   

   // find beginning of cookie value in document.cookie

   var prefix = name + "=";

   var begin = dc.indexOf("; " + prefix);

   if (begin == -1) {

      begin = dc.indexOf(prefix);

      if (begin != 0) return null;

   }

   else begin += 2;

   

   // find end of cookie value

   var end = document.cookie.indexOf(";", begin);

   if (end == -1) end = dc.length;

   

   // return cookie value

   return unescape(dc.substring(begin + prefix.length, end));

}





// Delete a named cookie value

function deleteCookie(name, path, domain) {

   domain = ".ieee.org";

   var value = getCookie(name);

   if (value != null) document.cookie = name + '=' + ((path) ? '; path=' + path : '') + ((domain) ? '; domain=' + domain : '') + '; expires=Thu, 01-Jan-70 00:00:01 GMT';

   return value;

}





// Fix Netscape 2.x Date bug

function fixDate(date) {

   var workingDate = date;

   var base = new Date(0);

   var skew = base.getTime();

   if (skew > 0) workingDate.setTime(workingDate.getTime() - skew);

   return workingDate;

}





// Test for cookie support

function supportsCookies(rootPath) {

   setCookie('checking_for_cookie_support', 'testing123', '', (rootPath != null ? rootPath : ''));

   if (getCookie('checking_for_cookie_support')) return true;

   else return false;

}