I Know That Few Person In Blogger Dont Know How To Hide Navbar.Let Me show You:

Go To Layout And Select Edit Html In Firefox Select You Will View A search Box And Do The Thing Shown Below......Have a Nice Try........

1. Search for the following line of code:

   ]]>

   Before the line, add in the following line of code:

   #navbar { display: none; }

   or:

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