Add custom template after_body_start in adminhtml

Question

How to add a custom template just after body tag in adminhtml in magento?

All working fine if I am trying to add custom template in head but failing if I am doing the same to include custom template in body of adminhtml page.

Here is my code for adminhtml layout file:

<default>
  <reference name="after_body_start">
    <block type="adminhtml/template" template="gtm/after_body_start.phtml" name="after_body_start_script" as="after_body_start_script"/>
  </reference>
</default>

Here is my code for the file present at app/design/adminhtml/default/default/template/gtm/after_body_tag.phtml

<?php
  Mage::log('control coming here', null, 'custom_log_file.log');
?>

If the control logs in my custom log file, It will work for the code I will write in it but I cannot see the log file updating.
It seems that either I am using wrong reference for adminhtml to include a custom template after body start or I am missing to include the block to be included somewhere!
Please guide me to get this done!

Answer 1

There is no any reference like after_body_start for admin.

Instead of this you can use before_body_end OR if you want this in top of the page then you can use reference name notifications and the code must be like :

<default>
   <reference name="before_body_end">
       <block type="adminhtml/template" template="gtm/after_body_start.phtml" name="after_body_start_script" as="after_body_start_script"/>
   </reference>
</default>