How to made if and else in vbulletin?

[BrotherX]

Hello, I want to put code in postbit so that I am able to have in some specific forums banners but when I don't have them (too many) than one common banner or message. Thanx in advance.

So here is the code and explanation inside that code:

OPTION I

<if condition="!in_array($forumid, array(FORUMID1))">

    <td class="alt1" align="center">
        <div>
<a href="$vboptions[forumhome].php$session[sessionurl_q]"><img src="banner_path.jpg" border="0" alt="$vboptions[bbtitle]" /></a></td>
<if />

OPTION II

<if condition="!in_array($forumid, array(FORUMID2))">

    <td class="alt1" align="center">
        <div>
<a href="$vboptions[forumhome].php$session[sessionurl_q]"><img src="banner_path.jpg" border="0" alt="$vboptions[bbtitle]" /></a></td>
<if />

IF NOT OPTION I AND OPTION II, THAN GENERAL OPTION

<if condition="!in_array($forumid, array(ANY OTHER FORUM ID))">

    <td class="alt1" align="center">
        <div>

MARKETING

        </div>
    </td>
<if />