Display Brand Logo (attribute) of a product depending on the Brand Name

<!-- ##### CODE TO SET THE BRAND LOGO USING BRAND NAME ##### -->
<div class="product-brand-logo">
<?php $brandname = $_product->getbrand_name() ?>
<img src="<?php echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA) . "brandlogo/" .$brandname . ".png"; ?>" />
</div>

I just fetched the brand name and put it inside a variable and then fetched the image using Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA)

reference:
http://www.magentocommerce.com/boards/viewthread/9701/
http://activecodeline.com/retrieving-url-paths-in-magento