Conditional Image Based On Category

Hi,

I’m trying to change the header image based on the Archive category.

I tried

<?php if(strstr($category,’34’)) : ?>

<img src=’https://jchmusic.com/frametop-newsflash.gif&#8217; alt=’page header’/>
<?php else : ?>
<img src=”https://jchmusic.com/frametop-weblog.gif&#8221; alt=”page header”/>
<?php endif; ?>

…which did nothing. So how does one capture the id or the name of the current category of the archive?

TIA,

—JC