Well formatted script for showing subcategories images in Magento

gistfile1.php

<?php $_maincategorylisting=$this->getCurrentCategory()?>
<?php $_categories=$this->getCurrentChildCategories()?>
<?php if($_categories->count()):?>
    <?php foreach ($_categories as $_category):?>
        <?php if($_category->getIsActive()):
            $cur_category=Mage::getModel('catalog/category')->load($_category->getId());
            $layer = Mage::getSingleton('catalog/layer');
            $layer->setCurrentCategory($cur_category);
            $catName = $this->getCurrentCategory()->getName();
// Test if the current category has an image assigned to it or not
        if($_imageUrl=!$this->getCurrentCategory()->getImageUrl()): ?>
                <?php /* Default subcategory jpg if no image exists */ ?>
                <div class="category-box">
                    <a href="<?php echo $this->getCategoryUrl($_category)?>">
                        <img src="<?php echo $this->getSkinUrl('images/catalog/product/placeholder/thumbnail.jpg') ?>">
                    </a>
                    <p><a href="<?php echo $this->getCategoryUrl($_category)?>"> <?php echo $catName ?></a></p>
                </div>
            <?php endif ?>
            <?php if($_imageUrl=$this->getCurrentCategory()->getImageUrl()):?>
                <?php /* Displays the subcategory image */ ?>
                <div class="category-box">
                    <a href="<?php echo $this->getCategoryUrl($_category)?>">
                        <img src="<?php echo $_imageUrl?>" height="80">
                    </a>
                    <p><a href="<?php echo $this->getCategoryUrl($_category)?>"> <?php echo $_category->getName()?></a></p>
                </div>
            <?php endif;
        endif;?>
    <?php endforeach ?>
    <?php $layer->setCurrentCategory($_maincategorylisting);  ?>
<?php endif; ?>