Increase Admin session timeout in magento

To increase the session time in admin Go to

System => Configuration => Admin => Security => set Session Lifetime (seconds) : value as you want. ( like : 14000).

 Now  go to System => Configuration =>Web => Session Cookie Management => set Cookie Lifetime
 14000.

Magento Call Java script Function in XML Top links.

<reference name="top.links">
    <action method="addLink" translate="label title" module="smartproductfinder">
        <label>Smart Product Finder</label>
        <title>javascript:void(0)</title>
        <prepare/><aParams/>
        <position>10</position>
        <li/><a>data-reveal-id="myModal"</a>
    </action>
</reference>

Magento Display Dropdown For Quntity Box

In the addtocart.phtml file find the following code(line 33)

<input name="qty" type="text" class="input-text qty" id="qty" maxlength="12" value="<?php echo $this->getMinimalQty($_product) ?>" />

Replace with this code: 
This code shows the “Available Qty for Product”.

<select class="input-text qty" name="qty" id="qty">
  <?php $i = 1 ?>
  <?php do { ?>
    <option value="<?php echo $i?>">
      <?php echo $i?>
      <?php $i++ ?>
    </option>
<?php } while ($i <= (int)Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getQty()) ?></select>

This code shows the “Maximum Qty Allowed in Shopping Cart”.

<select class="input-text qty" name="qty" id="qty">
    <?php $i = 1 ?>
    <?php do { ?>
        <option value="<?php echo $i ?>">
            <?php echo $i ?>
            <?php $i++ ?>
        </option>
    <?php } while ($i <= (int) Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getMaxSaleQty()) ?>
</select>

Magento Add Date Filed In Admin Form

Step-1 Add the following code in app/code/local/YourNamespace/YourModule/Block/Adminhtml/Yourmodule/Edit/Tab/Form.php

$fieldset->addField('purchase_date', 'date', array(
    'label'     => Mage::helper('subscription')->__('Purchase Date'),                  
    'name'      => 'purchase_date',
    'image'     => $this->getSkinUrl('images/grid-cal.gif'),
    'format'    => Mage::app()->getLocale()->getDateFormat(Mage_Core_Model_Locale::FORMAT_TYPE_SHORT)
));

Step-2 Now the date field with a datepicker is displayed in your admin form. To save the value into database, you need to add a line of code in saveAction() function of app/code/local/YourNamespace/YourModule/controllers/YourModuleController.php

if ($data = $this->getRequest()->getPost()) {

$data = $this->_filterDates($data, array('purchase_date', 'expiry_date'));

$model = Mage::getModel('subscription/subscription');     
$model->setData($data)
      ->setId($this->getRequest()->getParam('id'));

Hope it helps. Thanks.

Magento Create Limited & Random Product List.

In my case i have create featured product list with product 10 and it display randomaly.
Please copy past following code in your collection block file.

protected function _getProductCollection()
{
        if (is_null($this->_productCollection)) {
            $collection = Mage::getModel('catalog/product')->getCollection();
            $collection
            ->addAttributeToSelect(Mage::getSingleton('catalog/config')->getProductAttributes())
            ->addMinimalPrice()
            ->addFinalPrice()
                    ->addAttributeToFilter('featured_product', 1)
            ->addTaxPercents();
            $collection->getSelect()->order(new Zend_Db_Expr('RAND()'));
            $collection->setPage(1, 10)->load();

            Mage::getSingleton('catalog/product_status')->addVisibleFilterToCollection($collection);
            Mage::getSingleton('catalog/product_visibility')->addVisibleInCatalogFilterToCollection($collection);
            $this->_productCollection = $collection;

        }
        return $this->_productCollection;
}

Magento Sort Category(Navigation) By Name or Alphabatically.

To sort Top Menu Categories and its Sub-Categoiries alphabetically,

Copy app/code/core/Mage/Catalog/Block/Navigation.php to app/code/local/Mage/Catalog/Block/Navigation.php OR you can override the same file in your local

public function toLinearArray($collection)
{
        $array = array();
        foreach ($collection as $item) $array[] = $item;
        return $array;
}

protected function _sortCategoriesByName($cat1, $cat2)
{
       return strcasecmp($cat1->getName(), $cat2->getName());
}

In Navigation.php edit the function _renderCategoryMenuItemHtml(), add the following 2 lines before the code $hasChildren = ($children && $childrenCount);

$children = $this->toLinearArray($children);
usort($children, array($this, '_sortCategoriesByName'));

If you need to sort Parent Categories too, use below code before your foreach loop when you display category list

<?php $helper = Mage::helper('catalog/category') ?>
<?php $categories = $helper->getStoreCategories(); ?>
               
<?php $children = $this->toLinearArray($categories);
usort($children, array($this, '_sortCategoriesByName'));?>
   
<?php foreach ($children as $_category): ?>
<?php echo $this->drawItem($_category) ?>
<?php endforeach ?>

Magento Product Attribute Show/Hide in Admin Depending on Other Attribute Value

Please past this code in design/adminhtml/catalog/product/edit.phtml

<script type="text/javascript">

    Event.observe(window, 'load', function() {
        var $delDay = $("featured"); // featured is yes/no dropdown id
        if ($delDay.value == 0) {
        $('featured_position').value = ''; // delivery_time is show.hide attribute name
        $('featured_position').disable()
        }
    });

    Event.observe($("featured"), 'change', function() {
        var $delDay = $("featured");
        if ($delDay.value == 1) {
            $('featured_position').enable();
        }
        else {
            $('featured_position').value = '';
            $('featured_position').disable();
        }
    });
</script>