//
// ck_cookies.js
//
// basado en http://www.hidaho.com/cookies/cookie.txt
//

//
// ck_get(<ck_name>)
// ck_del(<ck_name>, [<path>,<domain>] )
// ck_set(<ck_name>,<ck_value> [,<expires>,<path>,<domain>,<secure>] )
// 

// constantes temporales
var ck_minute  = 60*1000;
var ck_hour    = 60*ck_minute;
var ck_day     = 24*ck_hour;
var ck_week    = 7*ck_day;
var ck_month   = 30*ck_day;
var ck_year    = 12*ck_month;
var ck_session = -ck_day;

function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function ck_get(name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}

function ck_set(name,value,expires,path,domain,secure) {
  var result = name + "=" + escape (value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
  document.cookie = result;
}

function ck_del(name,path,domain) {
  if (ck_get(name,path,domain)) {
    document.cookie = name + "=" +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}