function setCookie(name, value, chas) { 
      var valueEscaped = escape(value); 
      var expiresDate = new Date(); 
      expiresDate.setTime(expiresDate.getTime() + chas * 60 * 60 * 1000); // срок - 23 часа, но его можно изменить 
      var expires = expiresDate.toGMTString(); 
      var newCookie = name + "=" + valueEscaped + "; path=/; expires=" + expires; 
      if (valueEscaped.length <= 4000) document.cookie = newCookie + ";"; 
}

function getCookie(name) {
var cookie = " " + document.cookie;
var search = " " + name + "=";
var setStr = null;
var offset = 0;
var end = 0;
if (cookie.length > 0) {
offset = cookie.indexOf(search);
if (offset != -1) {
offset += search.length;
end = cookie.indexOf(";", offset)
if (end == -1) {
end = cookie.length;
}
setStr = unescape(cookie.substring(offset, end));
}
}
return(setStr);
}