To hide the Blogger Navbar :

1- Log in to blogger

2- On your Dashboard, select Layout. This will take you to the Template tab. Click Edit HTML. Under the Edit Template section you will see you blog's HTML.

3- paste the CSS definition in the top of the template code:

...

-----------------------------------------------
IndiaDyne
Name:     India Dyne
Designer: Blogger
URL:      www.indiadyne.blogspot.com
Date:     14 Feb 2010
Updated by: India Dyne  Team
----------------------------------------------- */

#navbar-iframe {
   display: none !important;
}

/* Variable definitions
  ====================
   
             type="color" default="#fff" value="#ffffff">
   
             default="#333" value="#333333">
   ...