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;

}



function SetCookie (name, value) {

  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();

  FixCookieDate (exp); // Correct for Mac bug

  exp.setTime (exp.getTime() - 1);  // This cookie is history

  var cval = GetCookie (name);

  if (cval != null)

    document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

}



var expdate = new Date();

var num_visits;

expdate.setTime(expdate.getTime() + (5*24*60*60*1000));

if (!(num_visits = GetCookie("num_visits")))

  num_visits = 0;

num_visits++;

SetCookie("num_visits",num_visits,expdate);