Get current user avatar

Hey everyone,

I’m working on a plugin that adds the admin info at the top of the admin menu. all going well except I can’t get the current users avatar. this is the code I have at the moment:

function yobd_user_admin_menu_info() {

	global $current_user;

	get_currentuserinfo();

	echo '<link rel="stylesheet" href="' . plugins_url( 'assets/css/user_info_in_admin_menu_style.css', __FILE__ ) . '" > ';

    ?>
    <script type="text/javascript">
        jQuery( document ).ready( function() {
            jQuery( '#adminmenuwrap' ).prepend( '<?php
            	echo '<div class="admin_user_menu_info_wrap">';
            		echo '<li>';
	            		echo '<a href="' . get_edit_user_link() . '">';
/* ===== this is the problem ===== */
	            			echo '<img src="' . get_avatar( $current_user->ID, 64 ) . '">';
	            		echo '</a>';
	            	echo '</li>';

	            	echo '<li>';
	            		echo '<a href="' . get_edit_user_link() . '">';
	            			echo '<p class="admin_user_menu_info_text admin_user_menu_info_name">';
	            				echo $current_user->user_login . '';
	            			echo '</p>';
	            		echo '</a>';
	            	echo '</li>';

	            	echo '<li>';
	            		echo '<a href="' . wp_logout_url() . '">';
	            			echo '<p class="admin_user_menu_info_text admin_user_menu_info_logout">Logout</p>';
	            		echo '</a>';
	            	echo '</li>';

            	echo '</div>';
            ?>');
        });
    </script>
    <?php

}

	add_action( 'admin_footer', 'yobd_user_admin_menu_info' );

?>

If i add a static url it works.
Any other suggestions to tidy up the code would be great!

Many thanks,
Joe