add_action( 'wp_enqueue_scripts', 'quality_child_add_scripts' );

/**
* Register and enqueue a script
*/
function quality_child_add_scripts() {
if(is_page_template('page-template-blog-right-sidebar-php')){
wp_register_script('quality_child-custom-subscription-script',get_stylesheet_directory_uri() . '/custom.js',false,'1.0',true);
wp_enqueue_script( 'quality_child-custom-subscription-script' );}
}