magento save all Textfields by clicking one Update

we are using following code to edit the price , quantity textfields for all products by clicking on one button. Price is working fine. Quantity is not working

Phtml code for Price

<input class="ama1" type = "text" id = "price_<?php echo $products->getId(); ?>" onkeydown="validateNumbers(event)" name= "price[]" value = "<?php echo $products->getPrice(); ?>" style = ""/>

<input type="hidden" name="curr_<?php echo $products->getId(); ?>" id="curr_<?php echo $products->getId(); ?>" value="<?php echo $products->getPrice(); ?>" />

<p id="updatedprice_<?php echo $products->getId(); ?>" style = "display:none;color:red; position:relative; top:16px;">Updated</p>
<br/>

<button id="price_reset_button_<?php echo $products->getId(); ?>" type="reset" class="cancel" onclick="hideResetPrice('<?php echo $products->getId(); ?>','<?php echo $products->getPrice(); ?>'); return false;">

<span><span><?php echo $helper->__('Cancel') ?></span></span>
</button>
</span>

Phtml code for QTY

<?php
$selllermpassignproduct=Mage::getModel('mpassignproduct/mpassignproduct')->getAssignProDetails($products->getId());
//Zend_Debug::dump($selllermpassignproduct,null,true);
$stock_item=Mage::getModel('cataloginventory/stock_item')->loadByProduct($products->getId());

$SellerQty=isset($selllermpassignproduct['sellerqty'])?$selllermpassignproduct['sellerqty']:$stock_item->getQty();
$assignqty=isset($selllermpassignproduct['assignqty'])?$selllermpassignproduct['assignqty']:0;
?>


<input class="ama1" type = "text" id = "qty_<?php echo $products->getId(); ?>" onkeydown="validateNumbers(event)" name = "stock" value = "<?php echo (int) $SellerQty; ?>" />
<input type="hidden" value="<?php echo (int) $SellerQty; ?>" id="currqty_<?php echo $products->getId(); ?>">


<p id="updatedqty_<?php echo $products->getId(); ?>" style = "display:none;color:red; position:relative; top:16px;">Updated</p>
<br/>


<button id="reset_button_<?php echo $products->getId(); ?>" type="reset" class="cancel" onclick="hideReset('<?php echo $products->getId(); ?>'); return false;"  >
<span><span><?php echo $helper->__('Cancel') ?></span></span>
</button>

code to update price and quantity for all products by clicking one button

controller.php

 public function massupdatesellerproAction(){
    if($this->getRequest()->isPost()){
        if(!$this->_validateFormKey()){
             $this->_redirect('marketplace/marketplaceaccount/myproductslist/');
        }
        $ids= $this->getRequest()->getParam('product_mass_update');
        $price= $this->getRequest()->getParam('price');
        $qty = $this->getRequest()->getParam('qty');
        foreach ($ids as $key => $value) {
    $product = Mage::getModel('catalog/product')->load($value);
    $product->setPrice($price[$key]);   // price
    $product->setQty($qty[$key]);       //qty



    $product->save();
        }
        Mage::getSingleton('core/session')->addSuccess( Mage::helper('marketplace')->__('Products has been sucessfully deleted from your account'));
        $this->_redirect('marketplace/marketplaceaccount/myproductslist/');


    }}

<input class="ama1" type = "text" id = "qty_<?php echo $products->getId(); ?>" onkeydown="validateNumbers(event)" name = "stock" value = "<?php echo (int) $SellerQty; ?>" />

you have calling the in name qty and your field name is stock change it to

<input class="ama1" type = "text" id = "qty_<?php echo $products->getId(); ?>" onkeydown="validateNumbers(event)" name = "qty[]" value = "<?php echo (int) $SellerQty; ?>" />