If you want to replace the WordPress logo on your admin login page with your own custom image, you can do it with just a couple simple lines in your functions.php file.
add_action("login_head", "my_login_head");
function my_login_head() {
echo "<style>
body.login #login h1 a {
background: url('".get_bloginfo('template_url')."/images/logo_login.png') no-repeat scroll center top transparent;
height: 181px;
width: 269px;
padding:0 25px;
}
</style>";
}
Simply upload your file to the proper path and adjust the CSS accordingly.
