<SCRIPT LANGUAGE="JavaScript">
var expDays = 10;
var page = "popup.html";
var frecuencia=15;
var windowprops = "width=290,height=260,location=no,toolbar=no,menubar=no,scrollbars=no,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 < 10000)
{ if (count % frecuencia== 0)
{ count++;
SetCookie('count', count, exp); window.open(page, "", windowprops);
}
else
{ count++;
SetCookie('count', count, exp); }
}
}
</script>
En el <body> colocar...
<body OnLoad="checkCount();">
Cada vez que se entra en la web, se genera una cookie que va contando, una vez se llega a 10, muestra el popup.