greasemonkey help

[darkfreaks]

i am writing a script that will alert users on a particular site that they have a new status message however the problem is that when i link it it does not go to the status page because it must have a username in the url, so how would i pull the predefined javascript for the username

<script>

var username="darkfreaks"; 
</script>

 

i need to pull that and pass it in the link variable so it doesnt come up a blank page.

 

i can't just pass darkfreaks because it would only pull my username.

 

the url is something like

vampirefreaks.com/profile/update_status.php?user=darkfreaks&show_updates