/**
 * Never worry about cache again!
 */
function my_load_scripts($hook) {
 
    // create my own version codes
    $my_js_ver  = date("ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'js/custom.js' ));
    $my_css_ver = date("ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'style.css' ));
     
    // 
    wp_enqueue_script( 'custom_js', plugins_url( 'js/custom.js', __FILE__ ), array(), $my_js_ver );
    wp_register_style( 'my_css',    plugins_url( 'style.css',    __FILE__ ), false,   $my_css_ver );
    wp_enqueue_style ( 'my_css' );
 
}
add_action('wp_enqueue_scripts', 'my_load_scripts');