www.fsf.org/20131028/files/login.js

   1 // Functions used by login pages
   2
   3 function cookiesEnabled() {
   4   // Test whether cookies are enabled by attempting to set a cookie and then change its value
   5   // set test cookie
   6   var c = "areYourCookiesEnabled=0";
   7   document.cookie = c;
   8   var dc = document.cookie;
   9   // cookie not set?  fail
  10   if (dc.indexOf(c) == -1) return 0;
  11   // change test cookie
  12   c = "areYourCookiesEnabled=1";
  13   document.cookie = c;
  14   dc = document.cookie;
  15   // cookie not changed?  fail
  16   if (dc.indexOf(c) == -1) return 0;
  17   // delete cookie
  18   document.cookie = "areYourCookiesEnabled=; expires=Thu, 01-Jan-70 00:00:01 GMT";
  19   return 1;
  20 }
  21
  22 function setLoginVars(user_name_id, alt_user_name_id, password_id, empty_password_id, js_enabled_id, cookies_enabled_id) {
  23   // Indicate that javascript is enabled, set cookie status, copy username and password length info to
  24   // alternative variables since these vars are removed from the request by zope's authentication mechanism.
  25   if (js_enabled_id) {
  26     el = document.getElementById(js_enabled_id);
  27     if (el) { el.value = 1; }
  28   }
  29   if (cookies_enabled_id) {
  30     el = document.getElementById(cookies_enabled_id);
  31     // Do a fresh cookies enabled test every time we press the login button
  32     //   so that we are up to date in case the user enables cookies after seeing
  33     //   the cookies message.
  34     if (el) { el.value = cookiesEnabled(); }
  35   }
  36   if (user_name_id && alt_user_name_id) {
  37     user_name = document.getElementById(user_name_id)
  38     alt_user_name = document.getElementById(alt_user_name_id)
  39     if (user_name && alt_user_name) {
  40        alt_user_name.value = user_name.value;
  41     }
  42   }
  43   if (password_id && empty_password_id) {
  44     password = document.getElementById(password_id)
  45     empty_password = document.getElementById(empty_password_id)
  46     if (password && empty_password) {
  47        if (password.value.length==0) {
  48           empty_password.value = '1';
  49        } else {
  50           empty_password.value = '0';
  51        }
  52     }
  53   }
  54   return 1;
  55 }
  56
  57 function showCookieMessage(msg_id) {
  58   // Show the element with the given id if cookies are not enabled
  59   msg = document.getElementById(msg_id)
  60   if (msg) {
  61      if (cookiesEnabled()) {
  62         msg.style.display = 'none';
  63      } else {
  64         msg.style.display = 'block';
  65      }
  66   }
  67 }
  68
  69 function showEnableCookiesMessage() {
  70   // Show the element with the id 'enable_cookies_message' if cookies are not enabled
  71   showCookieMessage('enable_cookies_message')
  72 }
  73 // Call showEnableCookiesMessage after the page loads
  74 registerPloneFunction(showEnableCookiesMessage);