// http://user.chollian.net/~laday

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 null;

}



//  SetCookie(cookiename, value, expdate , "/", null, false);

function SetCookie(name, value)

{

  var argv = SetCookie.arguments;

  var argc = SetCookie.arguments.length;

  var expires = (2 < argc) ? argv[2] : null;

  var path = (3 < argc) ? argv[3] : null;

  var domain = (4 < argc) ? argv[4] : null;

  var secure = (5 < argc) ? argv[5] : false;

  document.cookie = name + "=" + escape (value) +

    ((expires == null) ? "" : ("; expires=" + GetTimeForExpireDate(expires))) +

    ((path == null) ? "" : ("; path=" + path)) +

    ((domain == null) ? "" : ("; domain=" + domain)) +

    ((secure == true) ? "; secure" : "");

}



function GetTimeForExpireDate(day)

{

  var expdate = new Date();

  expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * day));

  return expdate;

}



function OpenEventWindow(url, windowname, windowoption)

{

  if (GetCookie(windowname) != "close") {

    window.open(url, windowname, windowoption);

  }

}



function CloseEventWindow(windowname, expireday)

{

  SetCookie(windowname, "close", GetTimeForExpireDate(expireday), "/");

}