display root child categoris in magento

how to display root child categories in magneto

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<?php $_helper = Mage::helper('catalog/category') ?>

<?php $_categories = $_helper->getStoreCategories() ?>

<?php $currentCategory = Mage::registry('current_category') ?>

<?php if (count($_categories) > 0): ?>

    <ul>

        <?php foreach($_categories as $_category): ?>

            <li>

                <a href="<?php echo $_helper->getCategoryUrl($_category) ?>">

                    <?php echo $_category->getName() ?>

                </a>

                <?php $_category = Mage::getModel('catalog/category')->load($_category->getId()) ?>

                <?php $_subcategories = $_category->getChildrenCategories() ?>

                <?php if (count($_subcategories) > 0): ?>

                    <ul>

                        <?php foreach($_subcategories as $_subcategory): ?>

                            <li>

                                <a href="<?php echo $_helper->getCategoryUrl($_subcategory) ?>">

                                    <?php echo $_subcategory->getName() ?>

                                </a>

                            </li>

                        <?php endforeach; ?>

                    </ul>

                <?php endif; ?>

            </li>

        <?php endforeach; ?>

    </ul>

<?php endif; ?>

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show product detail according to product id in magento

How to show product detail according to product id in magento

<?php

$obj = Mage::getModel('catalog/product');

$_product = $obj->load($product_id); // Enter your Product Id in $product_id

// get Product's name

echo $_product->getName();

//get product's short description

echo $_product->getShortDescription();

//get Product's Long Description

echo $_product->getDescription();

//get Product's Regular Price

echo $_product->getPrice();

//get Product's Special price

echo $_product->getSpecialPrice();

//get Product's Url

echo $_product->getProductUrl();

//get Product's image Url

echo $_product->getImageUrl();

?>