function setCookie (name, value) {
//  document.cookie = name + "=" + value + "; path=/;expires=Thursday,01-Jan-2099 00:00:00 GMT; domain=zhoumiao.21cn.com";
  document.cookie = name + "=" + value + "; path=/;expires=Thursday,01-Jan-2099 00:00:00 GMT";
}

function getCookie(name) {

  var search;

  search = name + "=";
  offset = document.cookie.indexOf(search); 
  if (offset != -1) {
    offset += search.length ;
    end = document.cookie.indexOf(";", offset) ;
    if (end == -1)
      end = document.cookie.length;
    return unescape(document.cookie.substring(offset, end));
  }
  else
    return "";
}

function deleteCookie(name) {

  setCookie(name, "");
}