//
// **********  Funciones para recuperar y grabar cookies **************
//
function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie (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 "";
}
    function SetCookie (name, value) {
      if ( value.length != 0 ) {
      var argv = SetCookie.arguments;
      var argc = SetCookie.arguments.length;
      var expires = (argc > 2) ? argv[2] : null;
      var path = (argc > 3) ? argv[3] : null;
      var domain = (argc > 4) ? argv[4] : null;
      var secure = (argc > 5) ? argv[5] : false;
      document.cookie = name + "=" + escape (value) +
        ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
        ((path == null) ? "" : ("; path=" + path)) +
        ((domain == null) ? "" : ("; domain=" + domain)) +
        ((secure == true) ? "; secure" : "");
    } }

    function DeleteCookie (name) {
      var exp = new Date();
      exp.setTime (exp.getTime() - 1);  // This cookie is history
      var cval = GetCookie (name);
      document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
    }

    function fecha(i) {
        var expdate = new Date ();
	if (i == 0) { expdate = null } else {
        expdate.setTime(expdate.getTime() + (i * 24 * 60 * 60 * 1000)) };
        return(expdate)
    }
function RecuperaCookies(cookie,variable) {
    if ( GetCookie(cookie) != null ) {
    variable  = GetCookie(cookie) }
}