how To add Custom Tab in admin Cetalog Product programmatically

We  want to add New Tab "Manage Weight" to manage My custom Code

1)Create a module "example NameSpace: Jewelry and Module Name: Basicprice "

2) Do Change in Module

                i)  in config.xml

                                <global>

                                                <blocks>

                                                                 <basicprice>

                                                                                <class>Jewelry_Basicprice_Block</class>

                                                                  </basicprice>                                                  

                                                </blocks>

                                </global>

replace  this code to overwrite product TAB

Code is:

<global>

<blocks> <basicprice><class>Jewelry_Basicprice_Block</class>  </basicprice>  

<adminhtml> <rewrite>                                                                                                   <catalog_product_edit_tabs>Jewelry_Basicprice_Block_Adminhtml_Tabs</catalog_product_edit_tabs></rewrite></adminhtml></blocks>

</global>

ii) Make a file "Tabs.php" in location app/code/local/Company/ModuleName/Block/Adminhtml/tabs.php

and past this code

<?php

class Jewelry_Basicprice_Block_Adminhtml_Tabs extends Mage_Adminhtml_Block_Catalog_Product_Edit_Tabs

{    public $parent;

    protected function _prepareLayout()    {

        //get all existing tabs

        $this->parent = parent::_prepareLayout();

        //add new tab

        $this->addTab('tabid', array(

            'label'     => Mage::helper('catalog')->__(' Manage Weight'),

            'content'   => $this->getLayout()->createBlock('basicprice/adminhtml_tabs_tabid')->toHtml(),

        ));

        return $this->parent;

    }

}?>

/public_html/app/code/local/Company/ModuleName/Block/Adminhtml/tabs.php

iii)Make a folder "Tabs" in location  app/code/local/Company/ModuleName/Block/Adminhtml/tabs/

iv) Create a "Tabid.php" file in location app/code/local/Company/ModuleName/Block/Adminhtml/tabs/ Tabid.php

and past this code

<?php

class Jewelry_Basicprice_Block_Adminhtml_Tabs_Tabid extends Mage_Adminhtml_Block_Widget

{    public function __construct()

    {        parent::__construct();

        $this->setTemplate('weight.phtml');

    }

}

?>

v) create a file weight.phtml in location  "app/design/adminhtml/default/default/template/ weight.phtml "

to manage Your custom code

Example: