/* referrer.js */

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 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;
}

var referer = GetCookie ('referer');

if (referer == null) {
  if(escape(top.document.referrer) != '') {
    var expDays = 365;
    var exp = new Date(); 
    exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
    SetCookie('referer', escape(top.document.referrer), exp);
  }
}