Where to Add Customizr Child Javascript

I am new to WordPress development. I have successfuly added a child theme to the customizr theme. I know this because the css in my style.css work fine. However I need to add some custom javascript files and I have not yet been successful. Here is the code:

function theme_javascript(){

if(is_page('retreats')){
// Deregister scripts
wp_deregister_script('ecwidapi');
wp_deregister_script('mytempo');

// Register jSon template
wp_register_script('mytempo',get_template_directory_uri().'/js/tempo.js');

// Register ECWID api
wp_register_script('ecwidapi',get_template_directory_uri().'/js/ecwidapi.js',array('jquery'));

wp_enqueue_script('mytempo');
wp_enqueue_script('ecwidapi');
}
}

add_action(‘wp_enqueue_scripts’,’theme_javascript’);

I want to remove this from the customizr functions.php file (where I have it now) and put it properly somewhere in a file in the child theme. Copying the functions.php file to the child directory and adding this code hasn’t worked.

Thank you advance for your instruction.

John