Add Javascript to footer in functions.php file From http://wordpress.stackexchange.com/questions/33008/how-to-add-a-javascript-snippet-to-the-footer-that-requires-jquery

footer-script

function myscript() {
    if( wp_script_is( 'jquery', 'done' ) ) {
    ?>
    <script type="text/javascript">
      // script dependent on jQuery
    </script>
    <?php
    }
}
add_action( 'wp_footer', 'myscript' );