How to show "Quote Button" ony for registered Users?

[zoooyo2]

Hi,

i want to show to Quote Button in the Posts only registered users? how can i make this done?

For Example i have

<if condition="$post['replylink']">
<a href="$post[replylink]" rel="nofollow">
<img src="$stylevar[imgdir_button]/
<if condition="$post['forwardlink']">reply_small<else />quote</if>
.gif" alt="$vbphrase[reply_with_quote]" border="0" /></a>
</if>

and need to add a further If condition, but dont know how. Could someone help me?