Displaying images in magento extension backend -

i developing extension , want display images on extension backend page. have stored images in 'images' folder in extension. trying show images using <img> tag. have provided image url in "src" attribute, not showing image @ backend page. in system.xml, using following code:-

<myoption translate="label">     <label>my label</label>     <frontend_type>radios</frontend_type>     <source_model>mymodule/source_buttons</source_model>     <sort_order>30</sort_order>     <show_in_default>1</show_in_default>     <show_in_website>1</show_in_website>     <show_in_store>1</show_in_store> </myoption> 

code in model\source\buttons.php file:-

 <?php  class mycompany_mymodule_model_source_buttons  {     public function tooptionarray()     {         $result = array();         $result[] = array('value' => '32', 'label'=>'<img src="'.mage::getmoduledir('', 'mycompany_mymodule').ds.'skin'.ds.'images'.ds.'img32.png" />');         $result[] = array('value' => '16', 'label'=>'<img src="'.mage::getmoduledir('', 'mycompany_mymodule').ds.'skin'.ds.'images'.ds.'img16.png" />');          return $result;       }     } 

on extension backend page, showing:-

<img src="c:\wamp\www\magento\app\code\community\mycompany\mymodule\skin\images\img32.png"> 

but src attribute value linking :-

http://mydomain/magento/index.php/admin/system_config/edit/section/mymodule_options/key/b834efa05ef37070c94d28c6b44e4bf0/c:/wamp/www/magento/app/code/community/mycompany/mymodule/skin/images/img32.png 

please help...

try this:

echo $this->getskinurl(); 

you can path images.