[tsigel]

function setCookie(name, value, options) {
  options = options || {};

  var expires = options.expires;

  if (typeof expires == "number" && expires) {
    var d = new Date();
    d.setTime(d.getTime() + expires*1000);
    expires = options.expires = d;
  }
  if (expires && expires.toUTCString) { 
  	options.expires = expires.toUTCString();
  }

  value = encodeURIComponent(value);

  var updatedCookie = name + "=" + value;

  for(var propName in options) {
    updatedCookie += "; " + propName;
    var propValue = options[propName];    
    if (propValue !== true) { 
      updatedCookie += "=" + propValue;
     }
  }

  document.cookie = updatedCookie;
}

// возвращает cookie с именем name, если есть, если нет, то undefined
function getCookie(name) {
  var matches = document.cookie.match(new RegExp(
    "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
  ));
  return matches ? decodeURIComponent(matches[1]) : undefined;
}

setCookie("111", "222");
alert(getCookie("111"));