jn32

Can anyone help me with this ?
This my script:

<script>
var exit=true;
if (document.referrer.indexOf('domainname.com') > -1) { exit = false; }
if (document.referrer.indexOf('www.domainname.com') > -1) { exit = false; }
function exitpop() { if (exit) { window.open("http://www.myexittradeurl.com") } }
</script>

I also want to exclude bookmarkers, how do I add that ?
Thanks for your help.