I am just trying to create a plugin that will add some JS to the header and custom CSs. I have this below but it adds the css wrong and shows as JS. This is first plugin i have attempted. <?php /** * Plugin Name: mmoore5553 Simple Range Slider * Plugin URI: mailto:[email protected] * Description: Simple Range Slider * Version: 1.0 * Author: [email protected] * Author URI: * License:GPL2 */ function SimpleRangeSlider() { wp_register_script('SimpleRangeSlider', plugins_url('/js/simple-slider.js', __FILE__), array('jquery'),'1.1', true); wp_enqueue_script('SimpleRangeSlider'); } add_action( 'wp_enqueue_scripts', 'SimpleRangeSlider' ); function SimpleRangeSlider1() { wp_register_script('stylesheet1', plugins_url('/css/simple-slider.css', __FILE__)); wp_enqueue_script('stylesheet1'); } add_action( 'wp_enqueue_scripts', 'SimpleRangeSlider1' ); function SimpleRangeSlider2() { wp_register_script('stylesheet2', plugins_url('/css/simple-slider-volume.css', __FILE__)); wp_enqueue_script('stylesheet2'); } add_action( 'wp_enqueue_scripts', 'SimpleRangeSlider2' ); ?>