var expDays = 1; // number of days the cookie should last

var page = "http://www.interdesigner.com";
var windowprops = "width=800,height=500,location=yes,toolbar=yes,menubar=yes,scrollbars=yes,status=yes,resizable=yes";

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();  
exp.setTime (exp.getTime() - 1);  
var cval = GetCookie (name);  
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
function amt(){
var count = GetCookie('count')
if(count == null) {
SetCookie('count','1')
return 1
}
else {
var newcount = parseInt(count) + 1;
DeleteCookie('count')
SetCookie('count',newcount,exp)
return count
   }
}
function getCookieVal(offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

function checkCount() {
var count = GetCookie('count');
if (count == null) {
count=1;
SetCookie('count', count, exp);

//so=window.open(page, "", windowprops);
//so.blur();
//window.focus;
}
else {
count++;
SetCookie('count', count, exp);
   }
}

// Get parameters from URL
function getParams() {
var idx = document.URL.indexOf('?');
var params = new Array();
if (idx != -1) {
var pairs = document.URL.substring(idx+1, document.URL.length).split('&');
for (var i=0; i<pairs.length; i++) {
nameVal = pairs[i].split('=');
params[nameVal[0]] = nameVal[1];
   }
}
return params;
}

params = getParams();


// Get affiliate, save if not exists
function getAffiliate() {
  var validDays = 365; // dias para que expire
  var expDate = new Date();
  expDate.setTime(expDate.getTime() +  (24 * 60 * 60 * 1000 * validDays));   

  var key = 'affiliate';
  var delaff = params["d"];
  
  // delete affiliate first if specified
  if (delaff != null && delaff == GetCookie(key)) {
    DeleteCookie(key);
  }

  var aff = GetCookie(key);
  var paff = params["a"];
  // paff is not lowercase?
  if (paff == null) {
    paff = params["A"];
  }
  if (paff != null) {
    paff = paff.toLowerCase();
  }

  if (aff == "undefined" || aff == "" || aff == "no affiliate" || aff == "null") {
    DeleteCookie(key);
	newaff = null;
  } else {
    newaff = aff;
  }

  if (newaff == null) {
    newaff = paff;
    if (newaff == null) {
      newaff = "no affiliate";
      SetCookie(key, newaff, expDate); 
    } else {
      SetCookie(key, newaff, expDate);
    }
  }
  if (newaff == "no affiliate") {
    newaff = '';
  }
return (newaff);   
}