Aide script popunder

Bonjour,

je voudrais modifier ce script afin qu'il ouvre differentes pages de maniere aletoires

<script type="text/javascript">
var cookieinfo;
function CookieExist(CookieName) { cookieinfo = document.cookie; if (cookieinfo.indexOf(CookieName) == -1) { return false; } else { return true; } }
function SetCookie(CookieName,CookieArgs,CookieExpire) { document.cookie = CookieName + "=" + CookieArgs + ";" + "expires=" + CookieExpire; }
function GetCookie(CookieName) { if ( CookieExist(CookieName) ){ d = cookieinfo.indexOf(CookieName) + CookieName.length + 1; f = cookieinfo.indexOf(";",d); if ( f == -1) { f = cookieinfo.length; } return (cookieinfo.substring(d,f)); } else { return ("0"); } }
</script>
<script type="text/javascript">
var pup=0;
function popup ()
{
if(pup===0)
{
pup=1;
if(GetCookie("deja_clique")==1)
{
return;
}
else
{
SetCookie("deja_clique",1,"");
window.open('http://www.google.fr','popup','toolbar=1,location=1,directories=1,status=1,scrollbars=1,resizable=1,copyhistory=1,menuBar=1,width=30000,height=30000');
window.focus();
popup.blur();
}
}
}
document.onclick=popup;
</script>

si vous avez une solution je suis preneuse

bye