Contador de visita do mesmo visitante

Exemplo

<script language="Javascript"> <!-- 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); //--> </script> <script language="Javascript"> <!-- document.write("Você já visitou meu bloguxo: "+num_visits+" vezes."); //--> </script> <!--FIM DO SCRIPT-->