Wordpress - Script Shortcode

functions.php

<?php

/**
 * Embed Scripts in Wordpress editor.
 *
 * Usage:
 * [js]http://youtsite.com/script.js[/js]
 * 
 * @param  array $atts
 * @param  string $content
 * @return string
 */
function cs_shortcode_script( $atts, $content = null ) {
    return '<script type="text/javascript" src="' . $content . '"></script>';
}

add_shortcode( 'js', 'cs_shortcode_script' );