So on the wordpress login page of my site I want to have two buttons below the login box, each button containing login info for specific user. Admin and demo. How can I accomplish this with JavaScript and where would I throw the buttons, wp-login.php? Thanks for your help.
One option is to implement some sort of hook on wordpress
More details on: http://codex.wordpress.org/Plugin_API/Action_Reference/login_form
Using this hook you can add another buttons as html or javascript code
add_action('login_form','login_extra_buttons');
function login_extra_buttons() {
?>
<a href="#" onclick="$('#user_login').value = 'demo';$('#user_pass').value = 'demo';">Demo Login</a>
<a href="#" onclick="$('#user_login').value = 'admin'; $('#user_pass').value = 'demo';">Admin Login</a>
<?php
}