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. Find the CSS definition code, it looks like below
paste the CSS definition in the top of the template code:
/*-----------------------------------------------
Blogger Template Style
Name: Shaik
Designer: Khadeer Shaik
URL: www.mybloggerplugins.com
Date: 30 Jun 2010
Updated by: Shaik
----------------------------------------------- */
Paste the below right after above css template code
#navbar-iframe {
display: none !important;
}