How to Change The Logo on WordPress Wp-Admin Login Page

Paste this simple code on your theme functions.php file to change the logo that is displayed for users on wp-admin login page.

function cs_loginimg() {
	  echo '<style type="text/css">
	    h1 a {background-image: url('.get_bloginfo('template_directory').'/images/login.gif) !important; }
	  </style>';
}
add_action('login_head', 'cs_loginimg');