// SurfStats JavaScript Code to store original referrer info.
// Put this file in an accessible location on your site and 
// call saveReferrerCookie() from your pages.


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;
}

// Write the cookie to remember user only if the cookie is not on user's computer
function saveReferrerCookie() {
   todayDate = new Date;
   id = todayDate;
   id= todayDate.getTime(); 
 
   var ref="" +document.referrer;
   var se="" +document.location.search;
   var agt=""+document.agent;
   var url=""+document.URL;
 
   if(top.document.location==document.referrer || (document.referrer == '' && top.document.location != '')) {
      ref=""+top.document.referrer;
      se=""+top.document.location.search;
      agt=""+top.document.agent;
      url=""+top.document.URL;
   }
 
   s="ref="+ref;
   s+="&id="+id;
   s+="&agt="+agt;
   s+="&url="+url;
   s+="&se="+se;
   expireDate = new Date;
   expireDate.setMonth(expireDate.getMonth()+1);

   var id2 = GetCookie('SurfDetails');
   i = ref.indexOf(url);
 
   if ((i < 0) || (id2 == null))  {
      document.cookie = "SurfDetails="+s+";expires=" + expireDate.toGMTString();
   }

}