function setCookie(name, value) { 
      var valueEscaped = escape(value); 
      var expiresDate = new Date(); 
      expiresDate.setTime(expiresDate.getTime() + 365 * 24 * 60 * 60 * 1000); // срок - 1 год, но его можно изменить 
      var expires = expiresDate.toGMTString(); 
      var newCookie = name + "=" + valueEscaped + "; path=/; expires=" + expires; 
      if (valueEscaped.length <= 4000) document.cookie = newCookie + ";"; 
} 

// Получить куки 
function getCookie(name) { 
      var prefix = name + "="; 
      var cookieStartIndex = document.cookie.indexOf(prefix); 
      if (cookieStartIndex == -1) return null; 
      var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length); 
      if (cookieEndIndex == -1) cookieEndIndex = document.cookie.length; 
      return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex)); 
}