gistfile1.txt

// changing the login page logo
function rgt_custom_dashboard_logo(){
echo '<style  type="text/css">
h1 a {
background-image:url('.get_stylesheet_directory_uri().'/images/put-your-logo-filename-here.gif)  !important;
}
</style>';
}
add_action('login_head',  'rgt_custom_dashboard_logo');

// changing the login page URL
function put_my_url(){
return ('http://www.yourdomain.com/'); // putting my URL in place of the WordPress one
}
 add_filter('login_headerurl', 'put_my_url');