Code Question

[Mum]

Can you tell me please with this bit

<if condition="$post[field26]">
<br />$post[field26]
</if>
What is the conditional based on? Is it just if field26 exsists?

--------------- Added [DATE]1213640615[/DATE] at [TIME]1213640615[/TIME] ---------------

<if condition="!in_array($profilefield[profilefieldid], array(24, 25, 26)) OR is_member_of($bbuserinfo, 82)">

I don't get this bit. If not field 24,25,26 or in 82? It doesn't amke sense, can someone put it in English for me.

--------------- Added [DATE]1213642182[/DATE] at [TIME]1213642182[/TIME] ---------------

I'm trying to add a 2nd one in, but can't get the code working, can you help me please. It's if they are in group 83, they can either have a large image (field27) linked (field24), or a small image (field28) linked (field24) AND some text (field26). I have been through this a million times nad can't work out why it's wrong.

<if condition="is_member_of($post, 83) AND $post[field24] AND $post[field25]">
    <div class="vBadvertisement">
        ----- Signature Sponsor -----
        <if condition="$post[field27]">
        <br /><a href ="$post[field24]<img src="$post[field27]">
            <else />
                <if condition="$post[field28]">
                <br /><a href ="$post[field24]<img src="$post[field28]">
                    <if condition="$post[field26]">
                    $post[field26]
                    </if>
                </if>
            </if>
        </if>    
    </div>
</if>