PHP SOLUTIONS

        $production = Mage::getSingleton('core/session')->getproValue($production); /* This is the session value which is set on Category/List page */
        $shipping = Mage::getSingleton('core/session')->getshipValue($ship);  /* This is the session value which is set on Category/List page */

/* This is code for Change Row Data of the product in cart and add Shipping charge in to that product into cart
         * Changes By Rixit
        // */
       
            $connection = Mage::getSingleton('core/resource')
            ->getConnection('core_read');
            $select = $connection->select()
            ->from('sales_flat_quote_item', array('MAX(item_id) as itn')); // select * from tablename or use array('id','name') selected values  
            $rowsArray = $connection->fetchAll($select); // return all rows
            $rowArray =$connection->fetchRow($select);   //return row
       
            $temp = $rowArray['itn'];
           
            $select1 = $connection->select()
            ->from('sales_flate_lastinsertd_id', array('MAX(last_inserted_id) as itn1')); // select * from tablename or use array('id','name') selected values  
            $rowsArray = $connection->fetchAll($select1); // return all rows
            $rowArray =$connection->fetchRow($select1);   //return row
       
            $itnew = $rowArray['itn1'];
       
            if( ($temp != $itnew) && ($temp >= $itnew) )
            {   
                $total = $production + $shipping;
       
                $connection = Mage::getSingleton('core/resource')
                ->getConnection('core_write');
       
                $connection->beginTransaction();
                $fields = array();
                $fields['last_inserted_id']= $temp;
                $fields['production_time']= $production;
                $fields['shipping_time']= $shipping;        
                $fields['total']= $total;        
                $connection->insert('sales_flate_lastinsertd_id', $fields);
                $connection->commit();
                               
            }
            else
            {
                //echo "Riisdfs";
            }
           
        /*
         * End of Changes By Rixit
        // */

<frontend>
...................
<events>
 <checkout_cart_product_update_after> <!--Here Event Name as per your Requirement -->
  <observers>
   <{Namespace}_{Module Name}_Model_Observer>
    <type>singleton</type>
    <class>{Namespace}_{Module Name}__Model_Observer</class>
    <method>updatecustomprice</method>
   </{Namespace}_{Module Name}__Model_Observer>
  </observers>
 </checkout_cart_product_update_after>
</events>
.................
</frontend>

class {Namespace}/{Module Name}_Model_Observer
{

public function updatecustomprice(Varien_Event_Observer $observer) {

$item = $observer->getQuoteItem();
$custom_vals = $_SESSION['custom_vals'];
if($custom_vals != '')
{
$additionalOptions = array(array(
'label' => '',
'value' => $custom_vals,
));
$item->addOption(array(
'code' => 'additional_options',
'value' => serialize($additionalOptions),
));
unset($_SESSION['custom_vals']);
}
$price = 123; //Here, set the Custom Price for Item
$item->setCustomPrice($price); // This set the Custom Price in Quote of cart
$item->setOriginalCustomPrice($price);
$item->getProduct()->setIsSuperMode(true);
}

}

/*Detect device*/

function detectdevice()
{
/*This will return TRUE if its Mobile Device otherwise give False*/

return (/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase()));

}

console.log(detectdevice());

/*Check any ID exist or not*/

<div id='id1'></div>

<script type="text/javascript">

var id_exist = jQuery('#id1').length;

console.log(id_exist);

        /*This will return 0 if ID not exist otherwise will get 1*/

</script>